Puzzle A - 0 - 1 - 2 - 3 random hints
Puzzle B - 0 - 1 - 2 - 3 random hints
Puzzle C - 0 - 1 - 2 - 3 random hints

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Notes

Objective / Rules - 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, top to bottom. - 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.

Help Read the help/walkthrough page on MathemaGrids for a more detailed explanation and a walkthrough. Each sum turns green when the three entered digits satisfy that sum - however, that doesn't necessarily mean that the digits match the answer.

Pencil Marks What is a pencil mark? Pencil marks can help you keep track of your own thinking, simply enter more than one digit/letter into each square, just like you might do if you were using pen and paper. The size of the digits/letters is smaller when there is more than one digit/letter in a square. A square might contain more pencil mark digits/letters than can be shown.

Checking If you click 'Check' the system will check for incorrect squares. If 'Show mistakes when checking' is checked they will be marked in red.

Uniqueness Each puzzle has exactly one solution. If you think you've found another solution, then please double check the rules.