The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 1039.
1039 has 4 digits. The digits in 1039 are 1, 0, 3, and 9.
When you are asking for the sum of the digits of 1039, you are basically asking what is
1 plus 0 plus 3 plus 9?
Therefore, the sum of the digits in 1039 is as follows:
1 + 0 + 3 + 9 = 13
Sum of digits in 1040
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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