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30 May, 14:06

Can you guys explain how to find the sum of the two digit multiples of 11?

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  1. 30 May, 14:19
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    I'm not sure I understand the question.

    The 2-digit multiples of 11 are 11, 22, 33, 44, 55, 66, 77, 88, and 99.

    Adam up!

    Another, easier and slightly slicker, way to do it would be to factor the list

    first, and then do the sum as:

    11 (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9) = 11 x 45
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