The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 2020.
2020 has 4 digits. The digits in 2020 are 2, 0, 2, and 0.
When you are asking for the sum of the digits of 2020, you are basically asking what is
2 plus 0 plus 2 plus 0?
Therefore, the sum of the digits in 2020 is as follows:
2 + 0 + 2 + 0 = 4
Sum of digits in 2021
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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