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