The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 3864.
3864 has 4 digits. The digits in 3864 are 3, 8, 6, and 4.
When you are asking for the sum of the digits of 3864, you are basically asking what is
3 plus 8 plus 6 plus 4?
Therefore, the sum of the digits in 3864 is as follows:
3 + 8 + 6 + 4 = 21
Sum of digits in 3865
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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