    MathemaGrids Help Rules / Objectives Summary

• Complete the grid using all of the digits 1 to 9.
• When completed all of the sums must be correct.
• The sums are solved strictly left to right, up to down.
• The normal order of mathematical operations is ignored.
• For example 2 + 5 x 9 is calculated as (2 + 5) x 9 = 63.
• There are no ÷ 1 in the puzzle.
• There are no x 1 in the puzzle (although there might be 1 x).
• At no point will any calculation go below zero, or fractional.

See the Walkthrough below for extra tips and tricks. What are the numbers for?These are the sums that have to be satisfied once all of the digits are placed.Each sum turns green when the digits entered make it correct.Move your mouse over the puzzle to see the answer.  Walkthrough  Step 1This is the start of the puzzle.Solve this puzzle for yourself at the same time.  Step 2There 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 3There is only one way to make 22 = 5 + 8 + 9 (as the 7 has already been used).  Step 4We 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 5The 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 6As there are no ÷ 1 in any puzzle, Row 3 must be 7 - 1 ÷ 6 = 1.  Step 7There 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 8This cannot be 9, as we've already used it. Similarly the centre square cannot be 4. The puzzle now completes.  Step 9The completed puzzle.    