The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 8415.
8415 has 4 digits. The digits in 8415 are 8, 4, 1, and 5.
When you are asking for the sum of the digits of 8415, you are basically asking what is
8 plus 4 plus 1 plus 5?
Therefore, the sum of the digits in 8415 is as follows:
8 + 4 + 1 + 5 = 18
Sum of digits in 8416
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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