Question

If the number 357A25B is divisible by 9 and 5, then (A+B) x AB = ??

Answer 1

Answer:

by divisiblity test

A=0 and B=5

therefore and is 0

Answer 2

HEY MATE

357A25B

B is either 5 or 0 because when a number is divisible by 5 the last digit should be either 5 or 0

condition 1:

B=5

3+5+7+A+2+5+5=22+A

22+5=27(divisible by 9)

condition 2:

B=0

3+5+7+A+2+5+0=27+A

27+0=27(divisible by 9)

A=5;B=0

(A+B)AB= (5+0)5×0

= 5×0=0

HENCE VERIFIED