Question

a number which ends in 5 or 0 is divisible by what

Answer 1

A number which ends with 0 or 5 if divisible by 5.
A number is divisible by 9 is the sum of its digits are divisible by 9.

Answer 2

A number which ends in 5 or 0 is divisible by 5 .

Example :- 3928598423841255415 is divisible by 5 because it ends in 5

Also, A number is divisible by 9 if the sum of digits is divisible by 9 .

Example :- 9123456780 is divisible by 9 as 9+ 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 0 = 45 ,45 is divisible by 9 .