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. so
unless x and y can represent multiple digit numbers? Then ends in a 2 or a 7}
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