Question 1
Three parallel rows of chairs. Row 1 has C, D, A, B facing South.
Row 2 has Q, R, S, P facing North. Row 3 has W, Z, 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.
C faces Q who faces W. D sits to the left of C in Row 1.
R faces D and also faces Z. S sits second to the right of R 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 Q who faces W: all three in the SAME vertical column.
Place at position 2:
Row1: _ C _ _
Row2: _ Q _ _
Row3: _ W _ _
Step 3: Apply left-right conditions
- D sits to the left of C(pos 2) in Row 1 → D at position 1
Row1: D C _ _
Step 4: Second facing relationship
- R faces D(Row1 pos1) → R at Row2 position 1
- R faces Z → Z at Row3 position 1
Row1: D C _ _
Row2: R Q _ _
Row3: Z W _ _
Step 5: Apply relative positioning in Row 2
- S sits second to the right of R(pos1): 1+2=3 → S at Row2 position 3
Row2: R Q S _
S faces Row1 pos3 → A at Row1 pos3 ✓
S faces Row3 pos3 → Y at Row3 pos3 ✓
Step 6: Fill remaining positions
Remaining: Row1 pos4=B, Row2 pos4=P, Row3 pos4=X
Final Arrangement:
Position: 1 2 3 4
Row 1 (↓): D C A B
Row 2 (↑): R Q S P
Row 3 (↓): Z W Y X
Right extreme of Row 3 = position 4 = X
Answer: X
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 Q who faces W: all three in the SAME vertical column.
Place at position 2:
Row1: _ C _ _
Row2: _ Q _ _
Row3: _ W _ _
Step 3: Apply left-right conditions
- D sits to the left of C(pos 2) in Row 1 → D at position 1
Row1: D C _ _
Step 4: Second facing relationship
- R faces D(Row1 pos1) → R at Row2 position 1
- R faces Z → Z at Row3 position 1
Row1: D C _ _
Row2: R Q _ _
Row3: Z W _ _
Step 5: Apply relative positioning in Row 2
- S sits second to the right of R(pos1): 1+2=3 → S at Row2 position 3
Row2: R Q S _
S faces Row1 pos3 → A at Row1 pos3 ✓
S faces Row3 pos3 → Y at Row3 pos3 ✓
Step 6: Fill remaining positions
Remaining: Row1 pos4=B, Row2 pos4=P, Row3 pos4=X
Final Arrangement:
Position: 1 2 3 4
Row 1 (↓): D C A B
Row 2 (↑): R Q S P
Row 3 (↓): Z W Y X
Right extreme of Row 3 = position 4 = X
Answer: X