Question

Six boxes, M, N, O, P, Q and R, are kept one above the other but not necessarily in the same order. There is only one box between box N and box R. Box Q is immediately below box N. There are only two boxes between box Q and box M. There is no box above box P. Box R is third from the bottom. Which box is third from the top?

• A. Q
• B. O
• C. N
• D. R

Answer 1

Answer:

A. Q

Solution:

Six boxes - M, N, O, P, Q and R, are kept one above the other but not necessarily in the same order.

1. There is no box above box P.

2. Box R is third from the bottom.

P

R

3. There is only one box between box N and box R.

Case I	Case II
P	P
N
R	R
	N

4. Box Q is immediately below box N.

The above condition cannot be satisfied in Case II, so it is eliminated.

Case I

P

N

Q

R

3. There are only two boxes between box Q and box M.

Case I

P

N

Q

R

M

Only one box O is left and it will occupy the vacant position.

So, the final arrangement is shown below:

Case I

P

N

Q

R

O

M

Clearly, box Q is third from the top.

Hence, ‘Q’ is the correct answer.