1.

If the number 653xy is divisible by 90 then x+y=?

Answer»

If the number 653xy is divisible by 90

so, 653xy should be divisible by both 9 and 10

any number divisible by 10 should have ZERO at END of it's number

so, y = 0

so,the number is 653x0

any number divisible by 9 sum of it's digits should be divisible by 9

so, 6+5+3+0 = 14 divisible by 9 which will remainder of 5

so, 5+4 = 9 which divisible by 9

so, x = 4

so, the number is 65340 which is divisible by 90

x + y = 4+0 = 4


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