if 123xy is divisible by 40 then the value in place of x y is
If 123xy is divisible by 40 then the value in place of x y is
Op2 : 3
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