4SquaresCalc

Let’s take brain exercises in the gap time! It's important to think flexibly.
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Do you know “Ten Puzzle”?
It’s the game which make the answer to 10 with 4 numbers and 3 operators.
This app shows the answer and 3 operators.
You choose 4 numbers to make the answer!
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for Example
This app shows:
the answer = 5
3 operators = +,-,+
you choose 4 numbers; 4,3,7,5
4+3-7+5 = 5
Congratulation! you makes the answer 5!