The "sum" is the result of adding something together, and "digits" refers to the individual
numbers that make up 1900.
1900 has 4 digits. The digits in 1900 are 1, 9, 0, and 0.
When you are asking for the sum of the digits of 1900, you are basically asking what is
1 plus 9 plus 0 plus 0?
Therefore, the sum of the digits in 1900 is as follows:
1 + 9 + 0 + 0 = 10
Sum of digits in 1901
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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