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17 February, 11:58

Prove the divisibility of the following numbers: 8^10-8^9-8^8 by 55

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  1. 17 February, 15:49
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    8^10 - 8^9 - 8^8 = 8^8· (8^2 - 8 - 1) = 8^8· (64 - 8 - 1) = 8^8·55

    Any multiple of 55 is divisible by 55.
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