explain why 7*11*13+13 and 7*6*5*4 are composite numbers?
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composite numbers are those which have more than two factors.
7×11×13 +13 = 1014
1014 has 2,3 and 13 as it's factors other than 1 and the number itself
7×6×5×4 = 840
It has 2, 3 ,4, 5,6,7,12 as its factors other than 1 and number itself .
so they are composite numbers
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