The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 3510.
3510 has 4 digits. The digits in 3510 are 3, 5, 1, and 0.
When you are asking for the sum of the digits of 3510, you are basically asking what is
3 plus 5 plus 1 plus 0?
Therefore, the sum of the digits in 3510 is as follows:
3 + 5 + 1 + 0 = 9
Sum of digits in 3511
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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