Question

Digital root is the single digit number obtained by continuously adding digits of the number till a single digit is obtained. The order of a number is the number of cycles of addition which need to be done on that number to obtain a single digit number. For example: 999 has a digital root = 9 and an order 2.
How many three digit numbers have a digital root = 5?

• A. 10
• B. 100
• C. 20
• D. 99

Answer 1

The correct option is B 100

Option (B) is the correct answer. Check the video for the approach.