Question

The six digit number 54321a is divisible by 9 where a is a single digit whole number find a

Answer 1

a =3
BY PUTTING THE VALUE WE GET.
54321/3
=60357
SO BY DIVIDING WE DID NOT GET THE REMAINDER SO IT IS DIVISIBLE BY 9

Answer 2

Given:

54321a is a 6-digit number divisible by 9

To Find:

The value of a

Solution:

Lets assume a = 0

543210 ÷ 9 = 60356 Remainder 6

⇒ Remainder 6 means that it is short of 3 to be divisible by 9

⇒ 543210 + 3 will be divisible by 9

⇒ The number is 543213

⇒ a = 3

Check:

543213 ÷ 9 = 60357 (with no remainder)

Answer: The value of a is 3