alleryA puzzle has 3 layers of 3 rows of 3 pieces. How many pieces?
A27
B18
C33
D9
Answer & Solution
Correct answer: A. 27
1. 3 × 3 = 9.
2. 9 × 3 = 27.
3. 9 is only the first step.
_Source: Wikipedia, Multiplication (CC BY-SA 4.0, rev 1378304279), Notation_
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