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8 November, 08:00

Is 57 divisible by 4 5 6 9 or 10

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  1. 8 November, 08:32
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    Since it is odd, 4, 6 and 10 cannot be divisors.

    5 cannot be a divisor since when you count by 5's you get numbers ending in 5 or 0

    (5,10,15,20, etc)

    9 cannot be a divisor since 9 x 6 = 54 and 9 sx 7 = 63

    None of your answers will work with 57.

    3 will work even though you did not list it. 5+7 = 12 and 1+2 = 3. If the sum of the digits = 3, 6 or 9, the number is divisible by 3.

    45 is divisible by 3 (4+5=9)

    78 is divisible by 3 (7+8=15 and 1+5 = 6)
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