The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 8544.
8544 has 4 digits. The digits in 8544 are 8, 5, 4, and 4.
When you are asking for the sum of the digits of 8544, you are basically asking what is
8 plus 5 plus 4 plus 4?
Therefore, the sum of the digits in 8544 is as follows:
8 + 5 + 4 + 4 = 21
Sum of digits in 8545
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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