Question

Which four digit number made up of 2,0,1,5 is divisible by 8?

Answer 1

Since 8 is an even number, so its multiple is also an even number and hence, the possibility of 1 or 5 being the units digit is ruled out. Now we know, 8^3=512 and if we multiply it by 10, it becomes 5120 and that is divisible by 8.