The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 9640.
9640 has 4 digits. The digits in 9640 are 9, 6, 4, and 0.
When you are asking for the sum of the digits of 9640, you are basically asking what is
9 plus 6 plus 4 plus 0?
Therefore, the sum of the digits in 9640 is as follows:
9 + 6 + 4 + 0 = 19
Sum of digits in 9641
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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