The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 7420.
7420 has 4 digits. The digits in 7420 are 7, 4, 2, and 0.
When you are asking for the sum of the digits of 7420, you are basically asking what is
7 plus 4 plus 2 plus 0?
Therefore, the sum of the digits in 7420 is as follows:
7 + 4 + 2 + 0 = 13
Sum of digits in 7421
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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