Calculate the digit sum of 257

Calculate the reduced digit sum of 257

Add up 3 digits of 257:

Digit Sum → 2 + 5 + 7 = 14

Since our digit sum > 9:
repeat this process to get the reduced digit sum:
Our new number to evaluate is 14

Add up 2 digits of 14:

Digit Sum → 1 + 4 = 5

Since our digit sum ≤ 9:
we have our reduced digit sum

Final Answer


Digit Sum = 14
Reduced Digit Sum = 5