Find all possible values of y for which the 4-digit number 64y3 is divisible by 9. Also, find the numbers.

We know that if sum of digits of a number is divisible by 9, then the number is divisible by 9.


Here,


6 + 4 + y + 3 = multiple of 9


y + 13= 0, 9, 18, …


Hence,


y + 13 = 18


y = 5


The number will be 6453.


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