Q: What is the digital root of 99,840,429

 A: 9

Why is 9 the digital root of the number 99,840,429?

The digital root of a number is calculated by splitting the digits of a number and then adding them together. You keep splitting and adding the digits until you reach a single positive number.

How do you calculate the digital root of 99,840,429?


Split the number up and add each digit together:


9 + 9 + 8 + 4 + 0 + 4 + 2 + 9 = 45

If the answer is more than one digit, you would add each digit of the answer together again:

4 + 5 = 9

What is the digital root of number 99,840,429?

Answer: 9


More Examples

Number 99,840,42799,840,42899,840,43099,840,431
Digital Root 7812

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