Question 1
Five persons D, A, B, E and C are sitting in a row facing North.
D sits at one of the extreme ends. A sits second to the right of D.
B sits immediately to the left of A. 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 → Place D at position 1
- A sits second to the right of D → A at position 3
- B sits immediately to the left of A → B at position 2
Position: D B A _ _
Step 3: Apply constraint conditions
- E is not at any extreme end → remaining positions are 4 and 5; E cannot be at 5, so E at position 4
- Only C remains → C at position 5
Final Arrangement (all facing North ↑):
Position: D B A E C
Verification:
✓ D at extreme end (pos 1)
✓ A second to the right of D (pos 3)
✓ B immediately to the left of A (pos 2)
✓ E not at extreme end (pos 4)
Answer: C sits at the other extreme end (position 5).
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 → Place D at position 1
- A sits second to the right of D → A at position 3
- B sits immediately to the left of A → B at position 2
Position: D B A _ _
Step 3: Apply constraint conditions
- E is not at any extreme end → remaining positions are 4 and 5; E cannot be at 5, so E at position 4
- Only C remains → C at position 5
Final Arrangement (all facing North ↑):
Position: D B A E C
Verification:
✓ D at extreme end (pos 1)
✓ A second to the right of D (pos 3)
✓ B immediately to the left of A (pos 2)
✓ E not at extreme end (pos 4)
Answer: C sits at the other extreme end (position 5).