Question

without actual division show that this number is divisible by 5 -555

Answer 1

555
The number in which the ones digit ends with 0 or 5 are divisible by 5.

so this no. is also divisible by 5

Answer 2

actually the number which is divided by 5 must end with 0 or 5.... so 555 is divisible by 5 as it follow the above criteria.