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How many ways can you find to make the number 10, by adding or subtracting prime numbers?

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How many ways can you find to make the number 10, by adding or subtracting prime numbers?
The same numbers but in a different order count as the same answer. (Prime numbers are only divisible by themselves and 1 so they are 2, 3, 5, 7, 11, 13, ...)

posted Dec 4, 2017 by anonymous

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