Math CentralQuandaries & Queries


Question from LIM, a parent:

"A" is a 4 digit number formed by all the numbers from 1 to 4. When "A" is divided by 9, the remainder is the biggest possible value. What is the biggest value of A?


It looks like a trick question. To discover the trick for yourself, try some examples such as 1234/9, 3124/9, and so on, and see what the remainder is in each case. You will soon guess what’s going on.


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