What is the total number of unique prime factors of $450?$

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by AAPL » Fri Jan 09, 2026 6:10 pm

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What is the total number of unique prime factors of $450?$

A. $2$
B. $3$
C. $4$
D. $5$
E. $18$

OA B

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Source: Beat The GMAT — Problem Solving | Fri Jan 09, 2026 6:10 pm

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