Answer
Digit Sum = 6
Reduced Digit Sum = 6

Steps Explained:
Calculate the digit sum of 33
Calculate the reduced digit sum of 33

Add up 2 digits of 33:
Digit Sum → 3 + 3 = 6
Since our digit sum ≤ 9:
we have our reduced digit sum
Final Answer
Digit Sum = 6
Reduced Digit Sum = 6
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1089 Number Trick