PROBLEM OF THE WEEK
The numbers 1, 2, 3, 4, 5 and 6 are placed, one per box, in the following cross so that the sum of
the 3 numbers in the row is 11 and the sum of the 4 numbers in the column is 11. Two of the numbers
have already been placed. What number has to be in the square marked with the question mark if each number can only be used once?
The numbers 1, 2, 3, 4, 5 and 6 are placed, one per box, in the following cross so that the sum of
the 3 numbers in the row is 11 and the sum of the 4 numbers in the column is 11. Two of the numbers
have already been placed. What number has to be in the square marked with the question mark if each number can only be used once?