
Step 1 This is the start of the puzzle.
Solve this puzzle for yourself at the same time.


Step 2 There is only one way to make 28 = 4 x 7 (or 7 x 4).
As there is no ÷ 1 in any puzzle, there is no way of making 7 with the first two digits. Therefore the last digit must be the 7.


Step 3 There is only one way to make 22 = 5 + 8 + 9 (as the 7 has already been used).


Step 4 We are still after the 4 (Step 2: 4 x 7 = 28) in Column 1, and 8 ÷ 2 is now the only way of doing this.


Step 5 The only remaining way to make 24 is 2 x 3 x 4. So the missing digits in Row 2 are 3 and 4.
Which means the remaining digits (1 and 6) must be in Row 3.


Step 6 As there are no ÷ 1 in any puzzle, Row 3 must be 7  1 ÷ 6 = 1.


Step 7 There is no way of reaching 42 in Column 3 if we use the 5, therefore Column 3 must be 9 x 4 + 6 = 42.


Step 8 This cannot be 9, as we've already used it. Similarly the centre square cannot be 4. The puzzle now completes.


Step 9 The completed puzzle.
