Thirteen boxes are kept in two stacks (Stack 1 and Stack 2) with seven shelves each. Stack 1 is to the west of Stack 2. Each shelf can hold one box, a...
Question
Thirteen boxes are kept in two stacks (Stack 1 and Stack 2) with seven shelves each. Stack 1 is to the west of Stack 2. Each shelf can hold one box, and one shelf is vacant in one of the stacks. Various conditions about the relative positions of boxes M, L, O, X, U, T, Q, R, N, C, S, A, and numbered boxes (11, 17, 21, 27, 29, 33, 38, 39, 51, 58) are given.
Question: How many boxes are kept above box M in the same stack?