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10 July, 00:48

Genevieve forgot the last two digits of her four-digit locker code: 21? If the number is divisible hy 5,6, and 7, what is Genevieve's locker code?

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  1. 10 July, 04:33
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    If a number is divisible by 5, 6, and 7,

    it's divisible by 5 x 6 x 7 = 210, the least

    common multiple of the numbers. So her number

    is a multiple of 210. The only 4-digit multiple

    is 210 that starts 210 _ is 2100, so that's her number.
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