The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 2577.
2577 has 4 digits. The digits in 2577 are 2, 5, 7, and 7.
When you are asking for the sum of the digits of 2577, you are basically asking what is
2 plus 5 plus 7 plus 7?
Therefore, the sum of the digits in 2577 is as follows:
2 + 5 + 7 + 7 = 21
Sum of digits in 2578
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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