The squares in the following grid are filled with numbers 1 to 9 without any repetition, such that they add to 11 and 23 in the two horizontal rows and to 24 in the vertical column. What number appears in the square marked A?
1
6
2
7
3
8
4
9
The squares in the following grid are filled with numbers 1 to 9 without any repetition, such that they add to 11 and 23 in the two horizontal rows and to 24 in the vertical column. What number appears in the square marked A?