Journal Chacham's Journal: Game: Game of 10
Playing the Game of 10. Make 10 from the numbers. Rules are pretty easy, and includes undo and replay. It starts in the tutorial as extremely easy, then gets harder and harder.
It's available online (javascript), with more levels in iOS, purportedly free for a few days before it goes up to $0.99.
Game: Game of 10 More Login
Game: Game of 10
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