Question
Find A as required:
The greatest 3 digit number 9A6 is divisible by 6

Answer

A number is divisible by 6 if it is divisible by both 2 and 3
9A6 is even and so divisible by 2
If A = 9 then the sum of digits will be 24 which is divisible by 3.
The number will be 996 and A = 9

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