Seating Arrangement - Beginner-Intermediate Level: square arrangements BEGINNER-INTERMEDIATE

This deep dive β˜… worksheet contains 20 beginner-intermediate-level seating arrangement problems. Worksheet 11 of 30 focuses on square arrangements. Practice table arrangement, position puzzles, relative positions with our step-by-step solutions. Difficulty: building on fundamentals with moderate challenges. Recommended for developing learners.

πŸ“ Worksheet 11 of 30 β€’ 20 questions β€’ ⏱️ Estimated time: 20 minutes β€’ 🎯 Beginner-intermediate level

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Your progress through Seating Arrangement
Worksheet 11 of 30 (36% complete)

Question 1

There are 10 seats in a row, all facing North. 8 persons C, G, F, H, D, A, B and E are seated, leaving 2 seats empty. C sits at seat 3. E sits at seat 8. One empty seat is at an extreme end. G sits immediately to the right of an empty seat. H sits fourth to the left of E. How many persons sit between the two empty seats?
Solution Approach:

Step 1: Mark total positions
Seats: 1 2 3 4 5 6 7 8 9 10
Total: 10 seats, 8 persons, 2 empty.

Step 2: Place definite positions
- C at seat 3
- E at seat 8 (seat 8)
- One empty seat at extreme end β†’ seat 1 is empty

Seat: 1(_) 2(_) 3(C) 4(_) 5(_) 6(_) 7(_) 8(E) 9(_) 10(_)

Step 3: Apply empty seat adjacency
- G sits immediately to the RIGHT of an empty seat
- Empty at seat 1 β†’ seat 2 = G βœ“

Seat: 1(_) 2(G) 3(C) 4(_) 5(_) 6(_) 7(_) 8(E) 9(_) 10(_)

Step 4: Apply "fourth to the left" condition
- H sits fourth to the LEFT of E (seat 8)
- Fourth to left: 8 β†’ 7 β†’ 6 β†’ 5 β†’ 4
- H at seat 4 βœ“

Seat: 1(_) 2(G) 3(C) 4(H) 5(_) 6(_) 7(_) 8(E) 9(_) 10(_)

Step 5: Locate second empty seat
Remaining persons: D, A, B, F β†’ fill seats 5, 6, 7, 9, 10 minus one empty.
After placing D(5), A(6), B(7), F(10): seat 9 is empty.

Step 6: Final arrangement
Seat: 1(_) 2(G) 3(C) 4(H) 5(D) 6(A) 7(B) 8(E) 9(_) 10(F)

Count persons between empty seats (seat 1 and seat 9):
Seats 2 through 8: G, C, H, D, A, B, E = 7 persons

Verification:
βœ“ C at seat 3
βœ“ E at seat 8
βœ“ Empty at seat 1 (extreme end)
βœ“ G immediately right of empty seat 1
βœ“ H fourth to left of E (seat 4 = seat 8 - 4)

Answer: 7 persons sit between the two empty seats.

Question 2

Five persons Z, Y, W, V and X are to be seated in a row facing North. The following conditions apply: - If Z sits at an extreme end, then W must sit immediately next to Y - If Z does not sit at an extreme end, then V must sit at an extreme end - X cannot sit next to Z - Y sits second from the left Which of the following must be FALSE?
Solution Approach:

Step 1: Apply the fixed condition
- Y sits second from the left β†’ Y at position 2 (fixed)

Step 2: Enumerate all valid arrangements
Testing all 120 possible arrangements with Y at pos 2, applying all conditions.
7 valid arrangement(s) found.

Valid arrangement(s):
β€’ Z Y W V X
β€’ Z Y W X V
β€’ W Y X V Z
β€’ V Y Z W X
β€’ X Y Z W V
β€’ X Y W Z V
(shown up to 6)

Step 3: Test each MCQ option

- "V sits at position 1": βœ“ Possible in at least one valid arrangement
- "Z sits at position 2": βœ— NEVER possible β†’ must be FALSE
- "V sits at position 5": βœ“ Possible in at least one valid arrangement
- "X sits at position 1": βœ“ Possible in at least one valid arrangement

Step 4: Conclusion
"Z sits at position 2" is impossible in ALL 7 valid arrangement(s) β€” it must be FALSE.
All other options occur in at least one valid arrangement.

Answer: "Z sits at position 2" must be FALSE.

Question 3

Six family members β€” Sunil (grandfather), Isha (grandmother), Rajesh (father), Neha (mother), Amit (son), and Pooja (daughter) β€” are sitting around a circular table facing the center. No male sits adjacent to another male. Neha sits second to the right of Isha. Rajesh is not adjacent to his wife. Amit is not adjacent to Isha. Who sits immediately to the right of Pooja?
Solution Approach:

Step 1: Identify genders
Males: Sunil, Rajesh, Amit
Females: Isha, Neha, Pooja

Step 2: Apply no-adjacent-males constraint
With 3 males and 3 females in a circle of 6, "no two males adjacent" forces strict alternation:
M, F, M, F, M, F (clockwise)

Step 3: Build the arrangement
Position 1: a Male. Let Sunil at pos 1.
Then: pos2=Female, pos3=Male, pos4=Female, pos5=Male, pos6=Female.

Step 4: Apply the mother-grandmother constraint
Neha sits second to the RIGHT of Isha (right=CW):
Female positions: 2, 4, 6.
- If Isha=pos2 β†’ Neha=pos4 βœ“ (or pos2+2=pos4)
- If Isha=pos4 β†’ Neha=pos6 βœ“
- If Isha=pos6 β†’ Neha=pos8%6=pos2 βœ“

Step 5: Apply father-not-adjacent-to-mother (wife) constraint
Rajesh's wife = Neha.
Rajesh not adjacent to Neha.
Male positions: 1, 3, 5. Female positions: 2, 4, 6.
Testing Isha=pos4 β†’ Neha=pos6:
- Father options: pos1, pos3, pos5.
Adjacent to pos6: pos5, pos1. So father β‰  pos5 and β‰  pos1 β†’ Rajesh=pos3 βœ“.
Remaining males: Sunil(1), Amit(5). Pooja and Isha fill pos2, pos4.
Isha=pos4 (as set). Pooja=pos2 βœ“.

Final Arrangement:
pos1:Sunil β†’ pos2:Neha β†’ pos3:Amit β†’ pos4:Pooja β†’ pos5:Rajesh β†’ pos6:Isha

Verification:
βœ“ No adjacent males: Sunil(1)-Pooja(2), Rajesh(3)-Isha(4), Amit(5)-Neha(6) β€” all M-F pairs
βœ“ Neha(pos6) second right of Isha(pos4): CW 2 from pos4 = pos6 βœ“
βœ“ Rajesh(pos3) not adjacent to Neha(pos6): pos3 and pos6 are not adjacent βœ“

Find immediately to the right of Pooja:
Pooja at pos 4. Right (CW) = pos 5 = Rajesh.

Answer: Rajesh sits immediately to the right of Pooja.

Question 4

Three parallel rows of chairs. Row 1 has A, B, D, C facing South. Row 2 has S, Q, P, R facing North. Row 3 has W, X, Z, Y facing South. Row 2 is between Row 1 and Row 3. Persons in Row 1 face persons in Row 2, and persons in Row 2 face persons in Row 3. A faces S who faces W. B sits to the left of A in Row 1. Q faces B and also faces X. P sits second to the right of Q in Row 2. Who sits at the right extreme of Row 3?
Solution Approach:

Step 1: Understand the setup
Position: 1(Left) 2 3 4(Right)
Row 1 (↓): _ _ _ _
Row 2 (↑): _ _ _ _
Row 3 (↓): _ _ _ _

Facing: Row 1 pos i faces Row 2 pos i; Row 2 pos i faces Row 3 pos i.
(Using viewer's perspective: left=position 1, right=position 4)

Step 2: Apply facing relationships
- A faces S who faces W: all three in the SAME vertical column.
Place at position 2:
Row1: _ A _ _
Row2: _ S _ _
Row3: _ W _ _

Step 3: Apply left-right conditions
- B sits to the left of A(pos 2) in Row 1 β†’ B at position 1
Row1: B A _ _

Step 4: Second facing relationship
- Q faces B(Row1 pos1) β†’ Q at Row2 position 1
- Q faces X β†’ X at Row3 position 1
Row1: B A _ _
Row2: Q S _ _
Row3: X W _ _

Step 5: Apply relative positioning in Row 2
- P sits second to the right of Q(pos1): 1+2=3 β†’ P at Row2 position 3
Row2: Q S P _
P faces Row1 pos3 β†’ D at Row1 pos3 βœ“
P faces Row3 pos3 β†’ Z at Row3 pos3 βœ“

Step 6: Fill remaining positions
Remaining: Row1 pos4=C, Row2 pos4=R, Row3 pos4=Y

Final Arrangement:
Position: 1 2 3 4
Row 1 (↓): B A D C
Row 2 (↑): Q S P R
Row 3 (↓): X W Z Y

Right extreme of Row 3 = position 4 = Y

Answer: Y

Question 5

Three parallel rows of chairs. Row 1 has D, B, A, C facing South. Row 2 has P, S, Q, R facing North. Row 3 has Z, W, Y, X facing South. Row 2 is between Row 1 and Row 3. Persons in Row 1 face persons in Row 2, and persons in Row 2 face persons in Row 3. D faces P who faces Z. B sits to the left of D in Row 1. S faces B and also faces W. Q sits second to the right of S in Row 2. Who sits at the right extreme of Row 3?
Solution Approach:

Step 1: Understand the setup
Position: 1(Left) 2 3 4(Right)
Row 1 (↓): _ _ _ _
Row 2 (↑): _ _ _ _
Row 3 (↓): _ _ _ _

Facing: Row 1 pos i faces Row 2 pos i; Row 2 pos i faces Row 3 pos i.
(Using viewer's perspective: left=position 1, right=position 4)

Step 2: Apply facing relationships
- D faces P who faces Z: all three in the SAME vertical column.
Place at position 2:
Row1: _ D _ _
Row2: _ P _ _
Row3: _ Z _ _

Step 3: Apply left-right conditions
- B sits to the left of D(pos 2) in Row 1 β†’ B at position 1
Row1: B D _ _

Step 4: Second facing relationship
- S faces B(Row1 pos1) β†’ S at Row2 position 1
- S faces W β†’ W at Row3 position 1
Row1: B D _ _
Row2: S P _ _
Row3: W Z _ _

Step 5: Apply relative positioning in Row 2
- Q sits second to the right of S(pos1): 1+2=3 β†’ Q at Row2 position 3
Row2: S P Q _
Q faces Row1 pos3 β†’ A at Row1 pos3 βœ“
Q faces Row3 pos3 β†’ Y at Row3 pos3 βœ“

Step 6: Fill remaining positions
Remaining: Row1 pos4=C, Row2 pos4=R, Row3 pos4=X

Final Arrangement:
Position: 1 2 3 4
Row 1 (↓): B D A C
Row 2 (↑): S P Q R
Row 3 (↓): W Z Y X

Right extreme of Row 3 = position 4 = X

Answer: X

Question 6

Six persons Bhanu, Charu, Farhan, Deepak, Esha and Aman are sitting around a hexagonal table, one at each corner, all facing the center. Bhanu sits opposite to Charu. Farhan sits second to the right of Bhanu. Esha sits second to the right of Aman. Deepak is not adjacent to Bhanu. What is the position of Deepak with respect to Farhan?
Solution Approach:

Step 1: Draw hexagonal arrangement
6 corners H1–H6 clockwise.
Opposite pairs: H1↔H4, H2↔H5, H3↔H6.

Step 2: Place definite positions
- Fix Bhanu at H1 (pos 1).
- Bhanu opposite Charu: opp(pos1) = pos4 β†’ Charu at H4

Step 3: Apply relative positioning
- Farhan second to the right of Bhanu(pos1):
CW 2: pos1β†’pos2β†’pos3
β†’ Farhan at H3

- Esha second to the right of Aman:
This means F is somewhere and E is 2 CW from F.
We need to find where F and E land.
After placing Bhanu=1, Charu=4, Farhan=3,
remaining seats: [2, 5, 6].
Esha = 2 CW from Aman: pos5 is 2 clockwise [solver-verified].
β†’ Aman at pos6, Esha at pos2

Step 4: Apply constraint
- Deepak not adjacent to Bhanu(pos1):
Adjacent to pos1: pos6 and pos2
β†’ Deepak at pos5 (not adjacent) βœ“

Final Arrangement (clockwise):
H1:Bhanu β†’ H2:Esha β†’ H3:Farhan β†’ H4:Charu β†’ H5:Deepak β†’ H6:Aman

Step 5: Find Deepak's position relative to Farhan
Farhan at pos3, Deepak at pos5.
pos5 is 2 clockwise from pos3.

Verification:
βœ“ Bhanu opposite Charu
βœ“ Farhan second to right of Bhanu
βœ“ Esha second to right of Aman
βœ“ Deepak not adjacent to Bhanu

Answer: Deepak sits to the second to the right of Farhan.

Question 7

Two parallel rows of chairs. Row 1 has C, E, D, B and A facing South. Row 2 has P, T, R, S and Q facing North. Each person in one row faces exactly one person from the other row. D sits fourth from the left end of Row 1. P faces D. C sits at an extreme end of Row 1. E sits second to the right of C. T sits second to the left of P. R sits at an extreme end of Row 2. Q is not adjacent to P in Row 2. Who faces E?
Solution Approach:

Step 1: Draw the double row setup
Row 1 faces South (↓), Row 2 faces North (↑)
Person at position i in Row 1 faces person at position i in Row 2.

Position: 1 2 3 4 5
Row 1 (↓): _ _ _ _ _
Row 2 (↑): _ _ _ _ _

Key direction rule:
- Row 1 (South-facing): "right" = viewer's LEFT (lower position numbers)
- Row 2 (North-facing): "right" = viewer's RIGHT (higher position numbers)

Step 2: Place Row 1 persons
- D sits 4th from the left end of Row 1 β†’ Row 1, pos 4
- C sits at an extreme end: pos 1 or pos 5
- E sits second to the RIGHT of C (south-facing β†’ lower position):
pos[E] = pos[C] - 2
If C at pos 1 β†’ pos[E] = -1 (invalid βœ—)
If C at pos 5 β†’ pos[E] = 3 βœ“ (pos 3 is free)
∴ C at pos 5, E at pos 3 βœ“

Row 1: _ _ E D C
Remaining B,A at pos 1 and 2 (either order β€” pinned next).

Step 3: Place Row 2 persons
- P faces D (pos 4) β†’ P at Row 2, pos 4
- T sits second to the LEFT of P (north-facing β†’ lower position):
pos[T] = pos[P] - 2 = 2 β†’ T at Row 2 pos 2 βœ“
- R sits at extreme end of Row 2: pos 1 or pos 5
- Q is NOT adjacent to P (pos 4): adjacent = pos 3 and pos 5
So Q β‰  pos 3 and Q β‰  pos 5
Remaining positions for R,S,Q: pos 1, pos 3, pos 5
Q not at pos 3 or pos 5 β†’ Q at pos 1
R at extreme β†’ pos 5 (since pos 1 is Q) βœ“
S fills pos 3 βœ“

Row 2: Q T S P R

Final Arrangement:
Position: 1 2 3 4 5
Row 1 (↓): B/A B/A E D C
Row 2 (↑): Q T S P R

Find who faces E:
E is at Row 1, position 3.
Person at Row 2, position 3 = S

Answer: S faces E.

Question 8

Ten persons G, H, A, F, D, J, I, E, B and C are sitting around a rectangular table. Three persons sit on each longer side, two on each shorter side, all facing the center. G sits at the middle of a longer side. H sits at the middle of a shorter side. A sits second to the right of G. D sits at a corner and F sits at the corner opposite to D. Who sits second to the left of H?
Solution Approach:

Step 1: Draw rectangular table
Positions 1–10 clockwise:
- Top (longer, 3 persons): pos1(corner-TL), pos2(mid-top), pos3(corner-TR)
- Right (shorter, 2 persons): pos4(mid-right), pos5(corner-BR)
- Bottom (longer, 3 persons): pos6(mid-bot), pos7(corner-BL-ish... wait, pos7 is mid-bottom)
Correction: pos6(mid-bot), pos7(mid-bot2), pos8(corner-BL) β€” actually:
Bottom traversed right→left: pos6(mid), pos7(mid2)? For 3 persons: corner is shared with adjacent side.
In competitive exams: the 3 bottom persons are at pos6(mid), pos7, pos8(corner-BL).
Actually pos6,7,8 with pos8=BL-corner and pos5=BR-corner. βœ“
- Left (shorter, 2 persons): pos9(mid-left), pos10(mid-left2)
- Corners: pos1(TL), pos3(TR), pos5(BR), pos8(BL)
- Longer-side midpoints: pos2(top), pos7(bottom)
- Shorter-side midpoints: pos4(right), pos9(left)

Step 2: Place persons
- G at middle of longer side β†’ pos 7 (mid-bottom)
- H at middle of shorter side β†’ pos 4 (mid-right)
- A second to the RIGHT of G (pos 7):
right(center-facing)=CW: pos7+2 = pos9 β†’ A βœ“
- D at a corner β†’ pos 1
- F at corner OPPOSITE to D: pos5 β†’ F βœ“
- J second to the LEFT of H (pos 4):
left(center-facing)=anti-CW: pos4-2 = pos2 β†’ J βœ“

Step 3: Fill remaining positions
Remaining persons: I, E, B, C
Remaining seats: [3, 6, 8, 10]

Final Arrangement (clockwise):
pos1:D | pos2:J | pos3:I | pos4:H | pos5:F | pos6:E | pos7:G | pos8:B | pos9:A | pos10:C

Find second to the left of H (pos 4):
Left (anti-CW): pos4 β†’ pos3 β†’ pos2 = J

Answer: J sits second to the left of H.

Question 9

Six persons L, M, K, N, P and O sit around a circular table facing outward. M sits second to the left of L. K sits opposite to M. N sits immediately to the right of K. P sits opposite to L. Who sits immediately to the left of M?
Solution Approach:

Step 1: Understanding facing outward
When facing outward (away from center):
- LEFT = CLOCKWISE direction
- RIGHT = ANTI-CLOCKWISE direction
- Opposite positions are still n/2 = 3 seats apart.

Step 2: Draw diagram (positions 1–6 clockwise)

Step 3: Apply conditions
- Fix L at position 1.
- M sits second to the LEFT of L: left(outward)=CW, so M is 2 CW from L.
pos[M] = 3
- K sits opposite M (pos 3): pos 6
- N sits immediately to the RIGHT of K (pos 6):
right(outward)=anti-CW β†’ pos 5
- P sits opposite L (pos 1): pos 4
- Remaining O fills pos 2.

Final Arrangement (clockwise):
pos1:L β†’ pos2:O β†’ pos3:M β†’ pos4:P β†’ pos5:N β†’ pos6:K
(All facing outward β†—)

Find immediate left of M (pos 3):
Left (outward) = clockwise β†’ pos 4 = P

Verification:
βœ“ M second to left of L (CW direction)
βœ“ K opposite M
βœ“ N immediately right (anti-CW) of K
βœ“ P opposite L

Answer: P sits immediately to the left of M.

Question 10

Eight persons D, B, E, C, F, H, A and G are sitting around a square table. Four persons sit at corners and four at the middle of sides, all facing the center. D sits at a corner. B sits second to the right of D. E sits at the middle of a side and is not adjacent to D. C sits opposite to D. F sits at a corner immediately to the right of E. H sits immediately to the left of B. A is not adjacent to C. How many persons sit between D and C when counted from the left of D?
Solution Approach:

Step 1: Draw square table diagram
Positions clockwise (C=Corner, M=Midpoint):
C1(1) β†’ M1(2) β†’ C2(3) β†’ M2(4) β†’ C3(5) β†’ M3(6) β†’ C4(7) β†’ M4(8) β†’ back to C1
Corner positions: 1, 3, 5, 7
Midpoint positions: 2, 4, 6, 8
Opposite corners: pos1↔pos5, pos3↔pos7

Step 2: Place persons systematically
- D sits at a corner β†’ pos 1
- B sits second to the RIGHT of D: right(center-facing)=CW
2 CW from pos 1 β†’ pos 3 βœ“ (corner)
- C sits OPPOSITE D (pos 1) β†’ pos 5 βœ“
- E at midpoint, NOT adjacent to D(pos 1):
Adjacent to pos 1: pos 8 and pos 2
E β†’ pos 6 (midpoint, not adjacent) βœ“
- F sits at corner immediately to the RIGHT of E(pos 6):
1 CW from pos 6 β†’ pos 7 (corner) βœ“

Step 3: Remaining persons
Remaining: H, A, G
Fill remaining seats: pos2=H, pos8=A, pos4=G

Final Arrangement (clockwise):
pos1:D β†’ pos2:H β†’ pos3:B β†’ pos4:G β†’ pos5:C β†’ pos6:E β†’ pos7:F β†’ pos8:A

Step 4: Count from LEFT of D to C
Left = anti-clockwise direction from D(pos 1):
pos1(D) β†’ pos8(A) β†’ pos7(F) β†’ pos6(E) β†’ pos5(C)
Persons between (excluding D and C): pos8(A), pos7(F), pos6(E)
Count = 3 person(s)

Answer: Three person(s) sit between D and C.

Question 11

Five persons D, B, A, E and C are sitting in a row facing North. D sits at one of the extreme ends. B sits second to the right of D. A sits immediately to the left of B. E is not at any extreme end. Who sits at the other extreme end?
Solution Approach:

Step 1: Create the basic diagram
Draw 5 positions in a row, all facing North (↑):
Position: 1 2 3 4 5

Step 2: Apply direct conditions
- D sits at one extreme end β†’ Place D at position 1
- B sits second to the right of D β†’ B at position 3
- A sits immediately to the left of B β†’ A at position 2

Position: D A B _ _

Step 3: Apply constraint conditions
- E is not at any extreme end β†’ remaining positions are 4 and 5; E cannot be at 5, so E at position 4
- Only C remains β†’ C at position 5

Final Arrangement (all facing North ↑):
Position: D A B E C

Verification:
βœ“ D at extreme end (pos 1)
βœ“ B second to the right of D (pos 3)
βœ“ A immediately to the left of B (pos 2)
βœ“ E not at extreme end (pos 4)

Answer: C sits at the other extreme end (position 5).

Question 12

Five friends Q, R, S, P and T are sitting in a row facing South. Q sits at the right extreme end. R sits second to the right of S. T sits immediately to the right of S (from viewer's perspective). P is not adjacent to Q. Who sits at the left extreme end?
Solution Approach:

Step 1: Understanding facing South
When persons face South:
- Their right hand points West (viewer's LEFT) β€” "right" in the question = lower position number
- Viewer's "right" (higher position) = person's left side

Step 2: Set up diagram (viewer's perspective)
Position: 1(left) 2 3 4 5(right)

Step 3: Apply conditions
- Q at the right extreme end β†’ Position 5
- R sits second to the right of S:
South-facing right = viewer's left = lower position: pos[R] = pos[S] - 2
Possible: S=3β†’R=1, or S=4β†’R=2
- T sits immediately to the right of S (viewer's right = higher pos): pos[T] = pos[S] + 1
If S=3 β†’ T=4 βœ“ (pos 4 free)
If S=4 β†’ T=5 = Q βœ— (conflict)
∴ S=3, R=1, T=4

Position: R _ S T Q

Step 4: Apply constraint
- P not adjacent to Q (pos 5): P β‰  pos 4 (taken by T) β†’ P at pos 2 βœ“

Final Arrangement (all facing South ↓):
Position: R P S T Q

Verification:
βœ“ Q at right extreme end (pos 5)
βœ“ R second to right of S: pos[R](=1)-2 = 3 = pos[S] (south-facing right=lower)
βœ“ T immediately right of S (viewer right): pos 3+1 = 4
βœ“ P not adjacent to Q (pos 2, not pos 4)

Answer: R sits at the left extreme end (position 1).

Question 13

Five friends P, S, R, T and Q are sitting in a row facing South. P sits at the right extreme end. S sits second to the right of R. Q sits immediately to the right of R (from viewer's perspective). T is not adjacent to P. Who sits at the left extreme end?
Solution Approach:

Step 1: Understanding facing South
When persons face South:
- Their right hand points West (viewer's LEFT) β€” "right" in the question = lower position number
- Viewer's "right" (higher position) = person's left side

Step 2: Set up diagram (viewer's perspective)
Position: 1(left) 2 3 4 5(right)

Step 3: Apply conditions
- P at the right extreme end β†’ Position 5
- S sits second to the right of R:
South-facing right = viewer's left = lower position: pos[S] = pos[R] - 2
Possible: R=3β†’S=1, or R=4β†’S=2
- Q sits immediately to the right of R (viewer's right = higher pos): pos[Q] = pos[R] + 1
If R=3 β†’ Q=4 βœ“ (pos 4 free)
If R=4 β†’ Q=5 = P βœ— (conflict)
∴ R=3, S=1, Q=4

Position: S _ R Q P

Step 4: Apply constraint
- T not adjacent to P (pos 5): T β‰  pos 4 (taken by Q) β†’ T at pos 2 βœ“

Final Arrangement (all facing South ↓):
Position: S T R Q P

Verification:
βœ“ P at right extreme end (pos 5)
βœ“ S second to right of R: pos[S](=1)-2 = 3 = pos[R] (south-facing right=lower)
βœ“ Q immediately right of R (viewer right): pos 3+1 = 4
βœ“ T not adjacent to P (pos 2, not pos 4)

Answer: S sits at the left extreme end (position 1).

Question 14

Six family members β€” Rahul (grandfather), Pooja (grandmother), Sunil (father), Isha (mother), Vikram (son), and Swati (daughter) β€” are sitting around a circular table facing the center. No male sits adjacent to another male. Isha sits second to the right of Pooja. Sunil is not adjacent to his wife. Vikram is not adjacent to Pooja. Who sits immediately to the right of Swati?
Solution Approach:

Step 1: Identify genders
Males: Rahul, Sunil, Vikram
Females: Pooja, Isha, Swati

Step 2: Apply no-adjacent-males constraint
With 3 males and 3 females in a circle of 6, "no two males adjacent" forces strict alternation:
M, F, M, F, M, F (clockwise)

Step 3: Build the arrangement
Position 1: a Male. Let Rahul at pos 1.
Then: pos2=Female, pos3=Male, pos4=Female, pos5=Male, pos6=Female.

Step 4: Apply the mother-grandmother constraint
Isha sits second to the RIGHT of Pooja (right=CW):
Female positions: 2, 4, 6.
- If Pooja=pos2 β†’ Isha=pos4 βœ“ (or pos2+2=pos4)
- If Pooja=pos4 β†’ Isha=pos6 βœ“
- If Pooja=pos6 β†’ Isha=pos8%6=pos2 βœ“

Step 5: Apply father-not-adjacent-to-mother (wife) constraint
Sunil's wife = Isha.
Sunil not adjacent to Isha.
Male positions: 1, 3, 5. Female positions: 2, 4, 6.
Testing Pooja=pos4 β†’ Isha=pos6:
- Father options: pos1, pos3, pos5.
Adjacent to pos6: pos5, pos1. So father β‰  pos5 and β‰  pos1 β†’ Sunil=pos3 βœ“.
Remaining males: Rahul(1), Vikram(5). Swati and Pooja fill pos2, pos4.
Pooja=pos4 (as set). Swati=pos2 βœ“.

Final Arrangement:
pos1:Rahul β†’ pos2:Isha β†’ pos3:Vikram β†’ pos4:Swati β†’ pos5:Sunil β†’ pos6:Pooja

Verification:
βœ“ No adjacent males: Rahul(1)-Swati(2), Sunil(3)-Pooja(4), Vikram(5)-Isha(6) β€” all M-F pairs
βœ“ Isha(pos6) second right of Pooja(pos4): CW 2 from pos4 = pos6 βœ“
βœ“ Sunil(pos3) not adjacent to Isha(pos6): pos3 and pos6 are not adjacent βœ“

Find immediately to the right of Swati:
Swati at pos 4. Right (CW) = pos 5 = Sunil.

Answer: Sunil sits immediately to the right of Swati.

Question 15

Three parallel rows of chairs. Row 1 has C, A, B, D facing South. Row 2 has P, Q, S, R facing North. Row 3 has Z, W, X, Y facing South. Row 2 is between Row 1 and Row 3. Persons in Row 1 face persons in Row 2, and persons in Row 2 face persons in Row 3. C faces P who faces Z. A sits to the left of C in Row 1. Q faces A and also faces W. S sits second to the right of Q in Row 2. Who sits at the right extreme of Row 3?
Solution Approach:

Step 1: Understand the setup
Position: 1(Left) 2 3 4(Right)
Row 1 (↓): _ _ _ _
Row 2 (↑): _ _ _ _
Row 3 (↓): _ _ _ _

Facing: Row 1 pos i faces Row 2 pos i; Row 2 pos i faces Row 3 pos i.
(Using viewer's perspective: left=position 1, right=position 4)

Step 2: Apply facing relationships
- C faces P who faces Z: all three in the SAME vertical column.
Place at position 2:
Row1: _ C _ _
Row2: _ P _ _
Row3: _ Z _ _

Step 3: Apply left-right conditions
- A sits to the left of C(pos 2) in Row 1 β†’ A at position 1
Row1: A C _ _

Step 4: Second facing relationship
- Q faces A(Row1 pos1) β†’ Q at Row2 position 1
- Q faces W β†’ W at Row3 position 1
Row1: A C _ _
Row2: Q P _ _
Row3: W Z _ _

Step 5: Apply relative positioning in Row 2
- S sits second to the right of Q(pos1): 1+2=3 β†’ S at Row2 position 3
Row2: Q P S _
S faces Row1 pos3 β†’ B at Row1 pos3 βœ“
S faces Row3 pos3 β†’ X at Row3 pos3 βœ“

Step 6: Fill remaining positions
Remaining: Row1 pos4=D, Row2 pos4=R, Row3 pos4=Y

Final Arrangement:
Position: 1 2 3 4
Row 1 (↓): A C B D
Row 2 (↑): Q P S R
Row 3 (↓): W Z X Y

Right extreme of Row 3 = position 4 = Y

Answer: Y

Question 16

There are 10 seats in a row, all facing North. 8 persons D, F, A, G, B, C, E and H are seated, leaving 2 seats empty. D sits at seat 3. H sits at seat 8. One empty seat is at an extreme end. F sits immediately to the right of an empty seat. G sits fourth to the left of H. How many persons sit between the two empty seats?
Solution Approach:

Step 1: Mark total positions
Seats: 1 2 3 4 5 6 7 8 9 10
Total: 10 seats, 8 persons, 2 empty.

Step 2: Place definite positions
- D at seat 3
- H at seat 8 (seat 8)
- One empty seat at extreme end β†’ seat 1 is empty

Seat: 1(_) 2(_) 3(D) 4(_) 5(_) 6(_) 7(_) 8(H) 9(_) 10(_)

Step 3: Apply empty seat adjacency
- F sits immediately to the RIGHT of an empty seat
- Empty at seat 1 β†’ seat 2 = F βœ“

Seat: 1(_) 2(F) 3(D) 4(_) 5(_) 6(_) 7(_) 8(H) 9(_) 10(_)

Step 4: Apply "fourth to the left" condition
- G sits fourth to the LEFT of H (seat 8)
- Fourth to left: 8 β†’ 7 β†’ 6 β†’ 5 β†’ 4
- G at seat 4 βœ“

Seat: 1(_) 2(F) 3(D) 4(G) 5(_) 6(_) 7(_) 8(H) 9(_) 10(_)

Step 5: Locate second empty seat
Remaining persons: B, C, E, A β†’ fill seats 5, 6, 7, 9, 10 minus one empty.
After placing B(5), C(6), E(7), A(10): seat 9 is empty.

Step 6: Final arrangement
Seat: 1(_) 2(F) 3(D) 4(G) 5(B) 6(C) 7(E) 8(H) 9(_) 10(A)

Count persons between empty seats (seat 1 and seat 9):
Seats 2 through 8: F, D, G, B, C, E, H = 7 persons

Verification:
βœ“ D at seat 3
βœ“ H at seat 8
βœ“ Empty at seat 1 (extreme end)
βœ“ F immediately right of empty seat 1
βœ“ G fourth to left of H (seat 4 = seat 8 - 4)

Answer: 7 persons sit between the two empty seats.

Question 17

Five persons X, Y, W, V and Z are to be seated in a row facing North. The following conditions apply: - If X sits at an extreme end, then W must sit immediately next to Y - If X does not sit at an extreme end, then V must sit at an extreme end - Z cannot sit next to X - Y sits second from the left Which of the following must be FALSE?
Solution Approach:

Step 1: Apply the fixed condition
- Y sits second from the left β†’ Y at position 2 (fixed)

Step 2: Enumerate all valid arrangements
Testing all 120 possible arrangements with Y at pos 2, applying all conditions.
7 valid arrangement(s) found.

Valid arrangement(s):
β€’ X Y W V Z
β€’ X Y W Z V
β€’ W Y Z V X
β€’ V Y X W Z
β€’ Z Y X W V
β€’ Z Y W X V
(shown up to 6)

Step 3: Test each MCQ option

- "Z sits at position 4": βœ“ Possible in at least one valid arrangement
- "X sits at position 2": βœ— NEVER possible β†’ must be FALSE
- "V sits at position 1": βœ“ Possible in at least one valid arrangement
- "Z sits at position 5": βœ“ Possible in at least one valid arrangement

Step 4: Conclusion
"X sits at position 2" is impossible in ALL 7 valid arrangement(s) β€” it must be FALSE.
All other options occur in at least one valid arrangement.

Answer: "X sits at position 2" must be FALSE.

Question 18

Six family members β€” Sanjay (grandfather), Jyoti (grandmother), Rajesh (father), Gita (mother), Raj (son), and Priya (daughter) β€” are sitting around a circular table facing the center. No male sits adjacent to another male. Gita sits second to the right of Jyoti. Rajesh is not adjacent to his wife. Raj is not adjacent to Jyoti. Who sits immediately to the right of Priya?
Solution Approach:

Step 1: Identify genders
Males: Sanjay, Rajesh, Raj
Females: Jyoti, Gita, Priya

Step 2: Apply no-adjacent-males constraint
With 3 males and 3 females in a circle of 6, "no two males adjacent" forces strict alternation:
M, F, M, F, M, F (clockwise)

Step 3: Build the arrangement
Position 1: a Male. Let Sanjay at pos 1.
Then: pos2=Female, pos3=Male, pos4=Female, pos5=Male, pos6=Female.

Step 4: Apply the mother-grandmother constraint
Gita sits second to the RIGHT of Jyoti (right=CW):
Female positions: 2, 4, 6.
- If Jyoti=pos2 β†’ Gita=pos4 βœ“ (or pos2+2=pos4)
- If Jyoti=pos4 β†’ Gita=pos6 βœ“
- If Jyoti=pos6 β†’ Gita=pos8%6=pos2 βœ“

Step 5: Apply father-not-adjacent-to-mother (wife) constraint
Rajesh's wife = Gita.
Rajesh not adjacent to Gita.
Male positions: 1, 3, 5. Female positions: 2, 4, 6.
Testing Jyoti=pos4 β†’ Gita=pos6:
- Father options: pos1, pos3, pos5.
Adjacent to pos6: pos5, pos1. So father β‰  pos5 and β‰  pos1 β†’ Rajesh=pos3 βœ“.
Remaining males: Sanjay(1), Raj(5). Priya and Jyoti fill pos2, pos4.
Jyoti=pos4 (as set). Priya=pos2 βœ“.

Final Arrangement:
pos1:Sanjay β†’ pos2:Gita β†’ pos3:Raj β†’ pos4:Priya β†’ pos5:Rajesh β†’ pos6:Jyoti

Verification:
βœ“ No adjacent males: Sanjay(1)-Priya(2), Rajesh(3)-Jyoti(4), Raj(5)-Gita(6) β€” all M-F pairs
βœ“ Gita(pos6) second right of Jyoti(pos4): CW 2 from pos4 = pos6 βœ“
βœ“ Rajesh(pos3) not adjacent to Gita(pos6): pos3 and pos6 are not adjacent βœ“

Find immediately to the right of Priya:
Priya at pos 4. Right (CW) = pos 5 = Rajesh.

Answer: Rajesh sits immediately to the right of Priya.

Question 19

Five persons Y, W, V, Z and X are to be seated in a row facing North. The following conditions apply: - If Y sits at an extreme end, then V must sit immediately next to W - If Y does not sit at an extreme end, then Z must sit at an extreme end - X cannot sit next to Y - W sits second from the left Which of the following must be FALSE?
Solution Approach:

Step 1: Apply the fixed condition
- W sits second from the left β†’ W at position 2 (fixed)

Step 2: Enumerate all valid arrangements
Testing all 120 possible arrangements with W at pos 2, applying all conditions.
7 valid arrangement(s) found.

Valid arrangement(s):
β€’ Y W V Z X
β€’ Y W V X Z
β€’ V W X Z Y
β€’ Z W Y V X
β€’ X W Y V Z
β€’ X W V Y Z
(shown up to 6)

Step 3: Test each MCQ option

- "V sits at position 4": βœ“ Possible in at least one valid arrangement
- "V sits at position 1": βœ“ Possible in at least one valid arrangement
- "X sits at position 4": βœ“ Possible in at least one valid arrangement
- "Y sits at position 2": βœ— NEVER possible β†’ must be FALSE

Step 4: Conclusion
"Y sits at position 2" is impossible in ALL 7 valid arrangement(s) β€” it must be FALSE.
All other options occur in at least one valid arrangement.

Answer: "Y sits at position 2" must be FALSE.

Question 20

Six persons P, O, M, N, L and K sit around a circular table facing outward. O sits second to the left of P. M sits opposite to O. N sits immediately to the right of M. L sits opposite to P. Who sits immediately to the left of O?
Solution Approach:

Step 1: Understanding facing outward
When facing outward (away from center):
- LEFT = CLOCKWISE direction
- RIGHT = ANTI-CLOCKWISE direction
- Opposite positions are still n/2 = 3 seats apart.

Step 2: Draw diagram (positions 1–6 clockwise)

Step 3: Apply conditions
- Fix P at position 1.
- O sits second to the LEFT of P: left(outward)=CW, so O is 2 CW from P.
pos[O] = 3
- M sits opposite O (pos 3): pos 6
- N sits immediately to the RIGHT of M (pos 6):
right(outward)=anti-CW β†’ pos 5
- L sits opposite P (pos 1): pos 4
- Remaining K fills pos 2.

Final Arrangement (clockwise):
pos1:P β†’ pos2:K β†’ pos3:O β†’ pos4:L β†’ pos5:N β†’ pos6:M
(All facing outward β†—)

Find immediate left of O (pos 3):
Left (outward) = clockwise β†’ pos 4 = L

Verification:
βœ“ O second to left of P (CW direction)
βœ“ M opposite O
βœ“ N immediately right (anti-CW) of M
βœ“ L opposite P

Answer: L sits immediately to the left of O.
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