For an integer n, n = n(n – 1)(n – 2) …….. 3.2.1. Then 1 + 2 + 3 + …. + 100 when divided by 5 leaves remainder

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For an integer n, n<br /> = n(n – 1)(n – 2) …….. 3.2.1. Then 1<br /> + 2<br /> + 3<br /> + …. + 100<br /> when divided by 5 leaves remainder