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Your goal is to remove numbers from the grid so that the remaining numbers in each row or column add up to the numbers next to that row or column. Click to remove or turn off a number, or click a removed number to add it back in. You can also click and hold a number to "lock" it on. If you know that a particular number needs to be used, you can lock it on to make solving the rest of the puzzle easier.
Coolmath top picks
Click to defeat monsters, earn gold and level up heroes. Ascend and transcend to reach new heights of power. See how far you can go!
The classic board game of moving and jumping. Play vs. the computer, or against a friend.
Warning: This game requires a huge amount of concentration and memorization as you run (or skate) through the 3 dimensional courses.
It really is. Don't ask us how to beat it. We can't. But we've seen it done and it's possible. You guys are on your own!
Checkmate! Get your pawns in a row and play this classic strategic board game. Play vs. the computer, a friend, or join a match against another online player.
A great business game where you run your own coffee shop. You have to plan your budget, your recipe and how much to charge.
The sequel to the popular Gluey! Group and remove blobs of the same color to get them to disappear. You're going to have to think and plan ahead!
The classic singleplayer card game. Choose your difficulty, and see if you can stack all four suits, Ace to King!
The highly addicting number puzzle. Three difficulty levels to choose from, unlimited boards to solve!
An easier twist on classic Solitaire. Play with 1, 2 or 4 Suits and try to remove all of the cards from the board!