Question 1
Five boxes P, Q, R, S, and T are in a stack numbered 1 to 5 from TOP to BOTTOM (1 is topmost, 5 is bottommost).
Given conditions:
- Box P is at the top (position 1)
- Box Q is at the bottom (position 5)
- Box S is immediately above box T
- Box R is at position 4
Which box is at position 4 from the top?
Step-by-step Solution:
1. Understanding the numbering system:
- Position 1 = TOP
- Position 5 = BOTTOM
2. Fixed positions:
- Position 1 = P
- Position 5 = Q
- Position 4 = R
3. Remaining positions: 2 and 3 for boxes S and T
4. "S is immediately above T":
- They must occupy consecutive positions with S above T
- Therefore: S at position 2, T at position 3
5. Final arrangement (top to bottom):
- Position 1: P
- Position 2: S
- Position 3: T
- Position 4: R
- Position 5: Q
6. Answer: Box R is at position 4
Verification: All conditions satisfied ✓
1. Understanding the numbering system:
- Position 1 = TOP
- Position 5 = BOTTOM
2. Fixed positions:
- Position 1 = P
- Position 5 = Q
- Position 4 = R
3. Remaining positions: 2 and 3 for boxes S and T
4. "S is immediately above T":
- They must occupy consecutive positions with S above T
- Therefore: S at position 2, T at position 3
5. Final arrangement (top to bottom):
- Position 1: P
- Position 2: S
- Position 3: T
- Position 4: R
- Position 5: Q
6. Answer: Box R is at position 4
Verification: All conditions satisfied ✓