What should be the least number to be added to the 51234 number to make it divisible by 9?

• A. 5
• B. 4
• C. 3
• D. 6

Answer: (C)

The least number to be added to the numbers to make them divisible by 9 is equal to the difference of the least multiple of 9 greater than the sum of the digits and sum of the digits.Sum of digits = 15.Nearest multiple of 9 greater than sum of digits = 18.Hence 3 has to be added.