Question

If 54321A is divisible by 9, then find the value of 'A'.

• A. 2
• B. 0
• C. 3
• D. 4

Answer 1

Answer:

C. 3

Given: 54321A is divisible by 9 Concept Used: Divisibility law of 9 ⇒ A number is divisible by 9 if the sum of its digit is divisible by 9. Calculation: Sum of digits of 54321A = 5 + 4 + 3 + 2 + 1 + A ⇒ 15 + A If we put A = 3 ⇒ 15 + 3 ⇒ 18 We know, 18 is divisible by 9. ∴ The required value of A is 3