The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 7516.
7516 has 4 digits. The digits in 7516 are 7, 5, 1, and 6.
When you are asking for the sum of the digits of 7516, you are basically asking what is
7 plus 5 plus 1 plus 6?
Therefore, the sum of the digits in 7516 is as follows:
7 + 5 + 1 + 6 = 19
Sum of digits in 7517
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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