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Drag numbers into the squares as you try to add the numbers up to the target sum to complete each puzzle. There are 60 levels to challenge your math skills. Keep dropping the numbers onto the board until all squares add up to the correct number. If you get stuck on any levels watch our helpful walkthrough video.

How to play: Tap and drag the numbers into the squares until you get the target sum.

Sum Square is an online puzzle game that we hand picked for Lagged.com. This is one of our favorite mobile puzzle games that we have to play. Simply click the big play button to start having fun. If you want more titles like this, then check out Impossible 13 or Rope Star.

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