Question 19
The numbers 1 to 9 are placed in the $3\times3$ grid, one number in each cell, according to these rules:
1, 8 and 6 are in the top row.
8, 3, 5, 1, 9 and 4 are not in the right column.
9, 4 and 2 are in the bottom row.
6, 4, 3, 1, 7 and 2 are not in the left column.
What number is in the middle cell?
1, 8 and 6 are in the top row.
8, 3, 5, 1, 9 and 4 are not in the right column.
9, 4 and 2 are in the bottom row.
6, 4, 3, 1, 7 and 2 are not in the left column.
What number is in the middle cell?