Mikel Gainza

The aim is to place the some numbers from the list (4, 8, 11, 13, 17, 20, 33, 37, 40, 45) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A*B-C.

If caa3c - 5ab5a = 4b187 find number abc. Multiple solutions may exist.

If 30843 - a0a4c = 20c9b find number abc. Multiple solutions may exist.