Question

What if more than two digits are interchanged? Will the difference stiU be divisible by 99? Illustrate your answer

Solution

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Answered 1 year ago
Answered 1 year ago
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Recall that we can figure out if the number is divisible by 99 if the sum of its digits is also divisible by 9. Since juggling the digit placements will not affect the sum of all the digits, hence, interchanging any digits should not affect the divisibility of its number.

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