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21 June, 18:24

11+22+33 + ... + 1010 is divided by 5. what is the remainder? (a) 0 (b) 1 (c) 2 (d) 3 (e) 4

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  1. 21 June, 18:39
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    Adding the last digits 1+2+3+4+5+6+7+8+9+0 = 45

    so the sum will end in 5 so its divisible by 5 and the remainder will be 0

    It (a)
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