A is in decimal representation : Find all naturAls numbers. X , Y.. so that A divide by 25 .
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Maybe I am misunderstanding something, I don't know.
so your number can be written:
where these are the decimal representation. , so you need only worry about when which is clearly only 25 or 75.
unless x and y can represent multiple digit numbers?
Then ends in a 2 or a 7}
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