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# Fill in the blanks to make the statements true.

A four-digit number *abcd* is divisible by 11, if *d* + *b* = …………… or …………….. .

Answer :

From the divisibility by 11 rule, if abcd is divisible by 11,

Then a-b + c-d = 0,

gives a + c = b + d, or each should be 0.

It also follows that a + c or b + d should be divisible by 11.

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