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Lizzie came up with a divisibility test for a certain number m /neq 1:

Break a positive integer  into two-digit chunks, starting from the ones place. (For example, the number  354764 would break into the two-digit chunks 64-47-35)

Find the alternating sum of these two-digit numbers, by adding the first number, subtracting the second, adding the third, and so on. (In our example, this alternating sum would be 52).

Find  m and show that this is indeed a divisibility test for m (by showing that n is divisible by m if and only if the result of this process is divisible by m).

 Aug 17, 2022
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Heres a link to the answered question:

 

https://web2.0calc.com/questions/help-needed-please-answer

 

:)

 Aug 17, 2022

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