if 123xy is divisible by 40 then the value in place of x y is

June 24, 2019

If 123xy is divisible by 40 then the value in place of x y is

Op1: 4

Op2 : 3

Op3: 2

Op: Can’t be determined.

Ans. Op3: 2
For 40 it should be divisible by 4 and 10
we know that for divisibility of 10 the last number should be zero so y=0
so the divisibility rule of 4 is last two numbers should be divisible by 4
we know that y is already 0.
so if we write 123×0/40 that zero will get cancelled and the remaining is 123x/4 so we need to check 3x for divisibility of 4
so it may be 32 or 36 so x is 2 or 6
so x+y = 2 or 6
so check the options to select a valid answer. it’s either 2 or 6

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