Egyptians made the number 7 back in B.C.
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That is 1 and 4/7
6*7*7 = 294
a prime number is a number that can not be made by multiplying. 1, 3, 5, 7 are prime numbers.
8752
2 to the 7th power = 128 * * * * * No. That is the total number of combinations, consisting of any number of elements. The number of 2 number combinations is 7*6/2 = 21