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Thread: Find the largest five digit number that is divisible by 7, 10, 15, 21 and 28.

  1. #1
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    Find the largest five digit number that is divisible by 7, 10, 15, 21 and 28.

    1. 99,840
    2. 99,900
    3. 99,960
    4. 99,990
    5. 99,970
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  2. #2
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    Re: Find the largest five digit number that is divisible by 7, 10, 15, 21 and 28.

    Any number divisible by 7, 10, 15, 21, and 28 must be divisible by 3*4*5*7= 420. Divide each of those given numbers by 420 to see which gives an integer quotient.
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  3. #3
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    Re: Find the largest five digit number that is divisible by 7, 10, 15, 21 and 28.

    Int[99999 / 420] * 420
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