Question
Which of the following boxes is placed exactly in the
middle? Study the following information carefully and answer the question given below: Nine boxes named M, N, O, P, Q, R, S, T and U are placed one above other but not necessarily in the same order. Only five boxes are placed between M and O. Q is placed immediate above O. Only three boxes are placed between Q and P. Number of boxes placed between M and P is same as between N and Q. R is placed below N, but not at bottom. Not less than four boxes are placed between Q and R. One box is placed between R and S. Box U is placed above box T.Solution
Only five boxes are placed between M and O. Q is placed immediate above O. Only three boxes are placed between Q and P. Following 5 cases are possible:  Number of boxes placed between M and P is same as between N and Q. Not less than four boxes are placed between Q and R. One box is placed between R and S. Box U is placed above box T. All the cases except Case3 eliminate as they do not satisfy the third hint. 
 Thus the final arrangement is as follows :   
 
- 58 83 133 ? 308 433 
- What will come in place of (?) Question mark in the given number series. - 28, 29, 38, 63, 112, 193, ? 
- 6 11 32 111 ? 2345 14100 ...
- 6400, 1600, ?, 80, 16, 4 
- 9 19 39 ? 159 319 
- 8 13 36 123 ? 2585 
- 10, 15, 25, 35, ?, 65 
- What will come in place of the question mark (?) in the following series? - 40, 25, 30, 50, 105, ? 
- 7.5% of 820.68 - 95% of 945.06 + 12.8% of 1050= ? 
- 97, 106, ?, 195, 411, 460