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

• A. 6
• B. 5
• C. 4
• D. 3

Answer: (D)

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.