Meaning of digit sum | Babel Free

Definitions

1. The sum of all digits.
2. the number obtained when repeatedly applying above described operation until arriving at a single-digit number.

Equivalents

Examples

“The digit sum of 517 is 5 + 1 + 7 = 13.”

“Given an integer X written in base⟳ 10 (as is usual), compute the sum of the digits of X: call⟳ the result⟳ the digit sum of X. If the digit sum is greater than 9, we form⟳ the digit sum again. Continue⟳ in this way to obtain⟳ the iterated digit sum which is at most 9.”

“The digit sum of 517 is 4, since 5 + 1 + 7 = 13 and 1 + 3 = 4.”

“The definition is that to find⟳ the digit sum of any number⟳, add⟳ all the digits in the number⟳. If number⟳ is a one digit no. then stop⟳ else add⟳ all the digits in this new number⟳. Continue⟳ this process⟳ till we get⟳ one digit number⟳.”

“Every number⟳ has a digit sum. The digit sum of 7 is seven. The digit sum of 62 is eight (6 + 2). The digit sum of 728 is also eight (7 + 2 + 8=17, 1 + 7 = 8). The digit sum of a number⟳ is found by adding all the digits in the number⟳ until a single digit is left.”

CEFR level