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TBT
Lv 7
TBT asked in Science & MathematicsMathematics · 1 decade ago

Proof of divisible of 4-digit number by .....?

a b c d is any 4-digit number, if

a + c = m

b + d = n

to prove that a b c d is divisible by the absolute value of (m - n).

Thanks

1 Answer

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  • alwbsok
    Lv 7
    1 decade ago

    Is it even true? For example:

    8813

    is not divisible by 2.

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