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8 ways
Well, isn't that just a happy little question! You can write 82 in two ways as 80 + 2 or 70 + 12. There are so many ways to express numbers, just like there are endless possibilities in painting a beautiful landscape.
70 divided by 10 = 7
There are 8!/(4!*4!) = 70 ways.
There are five ways to get a sum of 70 with two prime numbers: 3 + 67 = 70 11 + 59 = 70 17 + 53 = 70 23 + 47 = 70 29 + 41 = 70.