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26 March, 03:09

Find all integer numbers n, such that 1+2+3 + ... + n is divisible by 5

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  1. 26 March, 05:26
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    Any number that ends in 0 like, 10, 20, 30, ect. and numbers that end in 5 like, 25, 35, 45, are all divisible by 5.

    Step-by-step explanation:

    So if any of the sums end in 0 or 5 it is divisible by 5.
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