Digit Sum of 67

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Calculate the digit sum of 67

Calculate the reduced digit sum of 67

Add up 2 digits of 67:

Digit Sum → 6 + 7 = 13

Since our digit sum > 9:
repeat this process to get the reduced digit sum:
Our new number to evaluate is 13

Add up 2 digits of 13:

Digit Sum → 1 + 3 = 4

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

Final Answer