The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 672.
672 has 3 digits. The digits in 672 are 6, 7, and 2.
When you are asking for the sum of the digits of 672, you are basically asking what is
6 plus 7 plus 2?
Therefore, the sum of the digits in 672 is as follows:
6 + 7 + 2 = 15
Sum of digits in 673
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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