The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 4477.
4477 has 4 digits. The digits in 4477 are 4, 4, 7, and 7.
When you are asking for the sum of the digits of 4477, you are basically asking what is
4 plus 4 plus 7 plus 7?
Therefore, the sum of the digits in 4477 is as follows:
4 + 4 + 7 + 7 = 22
Sum of digits in 4478
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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