Question

If the seven digit number 575x352 is divisible by 72, the value of the digit ‘x’ is :​

Answer 1

Answer:

Here we know the divisibility test of 72 that is the no. must be divisible by both 8 and 9.

Divisibility test of 8 says that last 3 digits should be divisible by 8

so last 3 digit 352/8=44 divisible by 8

Divisibility of 9 is sum of all the digits in the no. Should be divisible by 9

so 5+7+5+x+3+5+2=27+x

and the multiple of 9 is 27

so x=0

hope you understand