The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 7820.
7820 has 4 digits. The digits in 7820 are 7, 8, 2, and 0.
When you are asking for the sum of the digits of 7820, you are basically asking what is
7 plus 8 plus 2 plus 0?
Therefore, the sum of the digits in 7820 is as follows:
7 + 8 + 2 + 0 = 17
Sum of digits in 7821
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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