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nr15, a nice little addictive math game tempting you to create 15 out of randomly chosen numbers.

To achieve this you can use any of the following operands in any given order as often as you think might be necessary :

+, adds two numbers.
-, minus subtracts two numbers.
x, multiplies two numbers.
/, divides two numbers.
x2, power multiplies one number by itself.
avg, average value of two numbers.
split, splits numbers into two digits (eg. 37 results in 3 & 7)

When connecting nr15 to Facebook the app will keep track of your fastest times, and offering the opportunity to let you be displayed as the fastest human calculator in the world.

Additionally you can opt to result the equations in 0, 15 or 37.

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