Three Parallel Rows: Worksheet 10 - Expert Practice Three Parallel Rows EXPERT

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 X: all three in the SAME vertical column.
Place at position 2:
Row1: _ D _ _
Row2: _ P _ _
Row3: _ X _ _

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

Step 4: Second facing relationship
- R faces A(Row1 pos1) → R at Row2 position 1
- R faces Y → Y at Row3 position 1
Row1: A D _ _
Row2: R P _ _
Row3: Y X _ _

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 P S _
S faces Row1 pos3 → B at Row1 pos3 ✓
S faces Row3 pos3 → W at Row3 pos3 ✓

Step 6: Fill remaining positions
Remaining: Row1 pos4=C, Row2 pos4=Q, Row3 pos4=Z

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

Right extreme of Row 3 = position 4 = Z

Answer: Z

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 Y: all three in the SAME vertical column.
Place at position 2:
Row1: _ C _ _
Row2: _ P _ _
Row3: _ Y _ _

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

Step 4: Second facing relationship
- Q faces B(Row1 pos1) → Q at Row2 position 1
- Q faces Z → Z at Row3 position 1
Row1: B C _ _
Row2: Q P _ _
Row3: Z Y _ _

Step 5: Apply relative positioning in Row 2
- S sits second to the right of Q(pos1): 1+2=3 → S at Row2 position 3
Row2: Q P S _
S faces Row1 pos3 → A at Row1 pos3 ✓
S faces Row3 pos3 → W at Row3 pos3 ✓

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

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

Right extreme of Row 3 = position 4 = X

Answer: X

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
- B faces P who faces Z: all three in the SAME vertical column.
Place at position 2:
Row1: _ B _ _
Row2: _ P _ _
Row3: _ Z _ _

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

Step 4: Second facing relationship
- R faces C(Row1 pos1) → R at Row2 position 1
- R faces W → W at Row3 position 1
Row1: C B _ _
Row2: R P _ _
Row3: W Z _ _

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 P 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=D, Row2 pos4=Q, Row3 pos4=X

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

Right extreme of Row 3 = position 4 = X

Answer: X

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 S who faces Z: all three in the SAME vertical column.
Place at position 2:
Row1: _ C _ _
Row2: _ S _ _
Row3: _ Z _ _

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

Step 4: Second facing relationship
- R faces A(Row1 pos1) → R at Row2 position 1
- R faces W → W at Row3 position 1
Row1: A C _ _
Row2: R S _ _
Row3: W Z _ _

Step 5: Apply relative positioning in Row 2
- P sits second to the right of R(pos1): 1+2=3 → P at Row2 position 3
Row2: R S P _
P faces Row1 pos3 → B at Row1 pos3 ✓
P faces Row3 pos3 → Y at Row3 pos3 ✓

Step 6: Fill remaining positions
Remaining: Row1 pos4=D, Row2 pos4=Q, Row3 pos4=X

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

Right extreme of Row 3 = position 4 = X

Answer: X

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 → B at position 1
Row1: B A _ _

Step 4: Second facing relationship
- R faces B(Row1 pos1) → R at Row2 position 1
- R faces Y → Y at Row3 position 1
Row1: B A _ _
Row2: R S _ _
Row3: Y W _ _

Step 5: Apply relative positioning in Row 2
- Q sits second to the right of R(pos1): 1+2=3 → Q at Row2 position 3
Row2: R S Q _
Q faces Row1 pos3 → C at Row1 pos3 ✓
Q faces Row3 pos3 → Z at Row3 pos3 ✓

Step 6: Fill remaining positions
Remaining: Row1 pos4=D, Row2 pos4=P, Row3 pos4=X

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

Right extreme of Row 3 = position 4 = X

Answer: X

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
- B faces R who faces W: all three in the SAME vertical column.
Place at position 2:
Row1: _ B _ _
Row2: _ R _ _
Row3: _ W _ _

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

Step 4: Second facing relationship
- Q faces C(Row1 pos1) → Q at Row2 position 1
- Q faces Z → Z at Row3 position 1
Row1: C B _ _
Row2: Q R _ _
Row3: Z W _ _

Step 5: Apply relative positioning in Row 2
- S sits second to the right of Q(pos1): 1+2=3 → S at Row2 position 3
Row2: Q R S _
S faces Row1 pos3 → A at Row1 pos3 ✓
S faces Row3 pos3 → X at Row3 pos3 ✓

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

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

Right extreme of Row 3 = position 4 = Y

Answer: Y

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 Z: all three in the SAME vertical column.
Place at position 2:
Row1: _ C _ _
Row2: _ Q _ _
Row3: _ Z _ _

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

Step 4: Second facing relationship
- S faces B(Row1 pos1) → S at Row2 position 1
- S faces W → W at Row3 position 1
Row1: B C _ _
Row2: S Q _ _
Row3: W Z _ _

Step 5: Apply relative positioning in Row 2
- P sits second to the right of S(pos1): 1+2=3 → P at Row2 position 3
Row2: S Q P _
P faces Row1 pos3 → D at Row1 pos3 ✓
P faces Row3 pos3 → Y at Row3 pos3 ✓

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

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

Right extreme of Row 3 = position 4 = X

Answer: X

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 Q who faces X: all three in the SAME vertical column.
Place at position 2:
Row1: _ D _ _
Row2: _ Q _ _
Row3: _ X _ _

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

Step 4: Second facing relationship
- R faces A(Row1 pos1) → R at Row2 position 1
- R faces Y → Y at Row3 position 1
Row1: A D _ _
Row2: R Q _ _
Row3: Y X _ _

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 → C at Row1 pos3 ✓
S faces Row3 pos3 → Z at Row3 pos3 ✓

Step 6: Fill remaining positions
Remaining: Row1 pos4=B, Row2 pos4=P, Row3 pos4=W

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

Right extreme of Row 3 = position 4 = W

Answer: W

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 X: all three in the SAME vertical column.
Place at position 2:
Row1: _ A _ _
Row2: _ S _ _
Row3: _ X _ _

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

Step 4: Second facing relationship
- P faces D(Row1 pos1) → P at Row2 position 1
- P faces Z → Z at Row3 position 1
Row1: D A _ _
Row2: P S _ _
Row3: Z X _ _

Step 5: Apply relative positioning in Row 2
- R sits second to the right of P(pos1): 1+2=3 → R at Row2 position 3
Row2: P S R _
R faces Row1 pos3 → B at Row1 pos3 ✓
R faces Row3 pos3 → Y at Row3 pos3 ✓

Step 6: Fill remaining positions
Remaining: Row1 pos4=C, Row2 pos4=Q, Row3 pos4=W

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

Right extreme of Row 3 = position 4 = W

Answer: W

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 X: all three in the SAME vertical column.
Place at position 2:
Row1: _ C _ _
Row2: _ Q _ _
Row3: _ X _ _

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

Step 4: Second facing relationship
- S faces B(Row1 pos1) → S at Row2 position 1
- S faces W → W at Row3 position 1
Row1: B C _ _
Row2: S Q _ _
Row3: W X _ _

Step 5: Apply relative positioning in Row 2
- P sits second to the right of S(pos1): 1+2=3 → P at Row2 position 3
Row2: S Q P _
P faces Row1 pos3 → D at Row1 pos3 ✓
P faces Row3 pos3 → Y at Row3 pos3 ✓

Step 6: Fill remaining positions
Remaining: Row1 pos4=A, Row2 pos4=R, Row3 pos4=Z

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

Right extreme of Row 3 = position 4 = Z

Answer: Z

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 W: all three in the SAME vertical column.
Place at position 2:
Row1: _ D _ _
Row2: _ P _ _
Row3: _ W _ _

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

Step 4: Second facing relationship
- Q faces C(Row1 pos1) → Q at Row2 position 1
- Q faces Z → Z at Row3 position 1
Row1: C D _ _
Row2: Q P _ _
Row3: Z W _ _

Step 5: Apply relative positioning in Row 2
- R sits second to the right of Q(pos1): 1+2=3 → R at Row2 position 3
Row2: Q P R _
R faces Row1 pos3 → B at Row1 pos3 ✓
R faces Row3 pos3 → Y at Row3 pos3 ✓

Step 6: Fill remaining positions
Remaining: Row1 pos4=A, Row2 pos4=S, Row3 pos4=X

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

Right extreme of Row 3 = position 4 = X

Answer: X

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 S who faces X: all three in the SAME vertical column.
Place at position 2:
Row1: _ C _ _
Row2: _ S _ _
Row3: _ X _ _

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
- Q faces D(Row1 pos1) → Q at Row2 position 1
- Q faces W → W at Row3 position 1
Row1: D C _ _
Row2: Q S _ _
Row3: W X _ _

Step 5: Apply relative positioning in Row 2
- P sits second to the right of Q(pos1): 1+2=3 → P at Row2 position 3
Row2: Q S P _
P faces Row1 pos3 → B at Row1 pos3 ✓
P faces Row3 pos3 → Z at Row3 pos3 ✓

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

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

Right extreme of Row 3 = position 4 = Y

Answer: Y

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
- A sits to the left of C(pos 2) in Row 1 → A at position 1
Row1: A C _ _

Step 4: Second facing relationship
- P faces A(Row1 pos1) → P at Row2 position 1
- P faces X → X at Row3 position 1
Row1: A C _ _
Row2: P Q _ _
Row3: X W _ _

Step 5: Apply relative positioning in Row 2
- S sits second to the right of P(pos1): 1+2=3 → S at Row2 position 3
Row2: P Q S _
S faces Row1 pos3 → D at Row1 pos3 ✓
S faces Row3 pos3 → Y at Row3 pos3 ✓

Step 6: Fill remaining positions
Remaining: Row1 pos4=B, Row2 pos4=R, Row3 pos4=Z

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

Right extreme of Row 3 = position 4 = Z

Answer: Z

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 R who faces Z: all three in the SAME vertical column.
Place at position 2:
Row1: _ C _ _
Row2: _ R _ _
Row3: _ Z _ _

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

Step 4: Second facing relationship
- Q faces B(Row1 pos1) → Q at Row2 position 1
- Q faces Y → Y at Row3 position 1
Row1: B C _ _
Row2: Q R _ _
Row3: Y Z _ _

Step 5: Apply relative positioning in Row 2
- S sits second to the right of Q(pos1): 1+2=3 → S at Row2 position 3
Row2: Q R S _
S faces Row1 pos3 → A at Row1 pos3 ✓
S faces Row3 pos3 → W at Row3 pos3 ✓

Step 6: Fill remaining positions
Remaining: Row1 pos4=D, Row2 pos4=P, Row3 pos4=X

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

Right extreme of Row 3 = position 4 = X

Answer: X

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 W: all three in the SAME vertical column.
Place at position 2:
Row1: _ D _ _
Row2: _ P _ _
Row3: _ W _ _

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

Step 4: Second facing relationship
- Q faces C(Row1 pos1) → Q at Row2 position 1
- Q faces X → X at Row3 position 1
Row1: C D _ _
Row2: Q P _ _
Row3: X W _ _

Step 5: Apply relative positioning in Row 2
- S sits second to the right of Q(pos1): 1+2=3 → S at Row2 position 3
Row2: Q P S _
S faces Row1 pos3 → B at Row1 pos3 ✓
S faces Row3 pos3 → Z at Row3 pos3 ✓

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

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

Right extreme of Row 3 = position 4 = Y

Answer: Y

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 Z: all three in the SAME vertical column.
Place at position 2:
Row1: _ A _ _
Row2: _ S _ _
Row3: _ Z _ _

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

Step 4: Second facing relationship
- P faces C(Row1 pos1) → P at Row2 position 1
- P faces Y → Y at Row3 position 1
Row1: C A _ _
Row2: P S _ _
Row3: Y Z _ _

Step 5: Apply relative positioning in Row 2
- Q sits second to the right of P(pos1): 1+2=3 → Q at Row2 position 3
Row2: P S Q _
Q faces Row1 pos3 → D at Row1 pos3 ✓
Q faces Row3 pos3 → X at Row3 pos3 ✓

Step 6: Fill remaining positions
Remaining: Row1 pos4=B, Row2 pos4=R, Row3 pos4=W

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

Right extreme of Row 3 = position 4 = W

Answer: W

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 → B at position 1
Row1: B A _ _

Step 4: Second facing relationship
- R faces B(Row1 pos1) → R at Row2 position 1
- R faces Z → Z at Row3 position 1
Row1: B A _ _
Row2: R S _ _
Row3: Z W _ _

Step 5: Apply relative positioning in Row 2
- Q sits second to the right of R(pos1): 1+2=3 → Q at Row2 position 3
Row2: R S Q _
Q faces Row1 pos3 → C at Row1 pos3 ✓
Q faces Row3 pos3 → Y at Row3 pos3 ✓

Step 6: Fill remaining positions
Remaining: Row1 pos4=D, Row2 pos4=P, Row3 pos4=X

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

Right extreme of Row 3 = position 4 = X

Answer: X

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 Y: all three in the SAME vertical column.
Place at position 2:
Row1: _ C _ _
Row2: _ Q _ _
Row3: _ Y _ _

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

Step 4: Second facing relationship
- P faces B(Row1 pos1) → P at Row2 position 1
- P faces X → X at Row3 position 1
Row1: B C _ _
Row2: P Q _ _
Row3: X Y _ _

Step 5: Apply relative positioning in Row 2
- S sits second to the right of P(pos1): 1+2=3 → S at Row2 position 3
Row2: P Q S _
S faces Row1 pos3 → A at Row1 pos3 ✓
S faces Row3 pos3 → Z at Row3 pos3 ✓

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

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

Right extreme of Row 3 = position 4 = W

Answer: W

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 S who faces W: all three in the SAME vertical column.
Place at position 2:
Row1: _ C _ _
Row2: _ S _ _
Row3: _ W _ _

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

Step 4: Second facing relationship
- R faces B(Row1 pos1) → R at Row2 position 1
- R faces X → X at Row3 position 1
Row1: B C _ _
Row2: R S _ _
Row3: X W _ _

Step 5: Apply relative positioning in Row 2
- P sits second to the right of R(pos1): 1+2=3 → P at Row2 position 3
Row2: R S P _
P faces Row1 pos3 → A at Row1 pos3 ✓
P faces Row3 pos3 → Z at Row3 pos3 ✓

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

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

Right extreme of Row 3 = position 4 = Y

Answer: Y

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
- P faces D(Row1 pos1) → P at Row2 position 1
- P faces X → X at Row3 position 1
Row1: D C _ _
Row2: P Q _ _
Row3: X W _ _

Step 5: Apply relative positioning in Row 2
- R sits second to the right of P(pos1): 1+2=3 → R at Row2 position 3
Row2: P Q R _
R faces Row1 pos3 → B at Row1 pos3 ✓
R faces Row3 pos3 → Z at Row3 pos3 ✓

Step 6: Fill remaining positions
Remaining: Row1 pos4=A, Row2 pos4=S, Row3 pos4=Y

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

Right extreme of Row 3 = position 4 = Y

Answer: Y