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Question
In the following number, replace M by the smallest number to make resulting number divisible by 11: 39M2
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Solution
The given number = 39M2
Sum of its digits in odd places = 3 + M
Sum of its digits in even place = 9 + 2 = 11
Their Difference = 11 – (3 + M)
11 – (3 + M) = 0 11 – 3 = M M = 8
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