The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 9723.
9723 has 4 digits. The digits in 9723 are 9, 7, 2, and 3.
When you are asking for the sum of the digits of 9723, you are basically asking what is
9 plus 7 plus 2 plus 3?
Therefore, the sum of the digits in 9723 is as follows:
9 + 7 + 2 + 3 = 21
Sum of digits in 9724
See if you can calculate the sum of the digits in the next number on our list before you go here.
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