Solution: To find the GCF of 42 and 63, factor both numbers. $42 = 2 \times 3 \times 7$ and $63 = 3^2 \times 7$. The common prime factors are $3$ and $7$. Multiply them: $3 \times 7 = 21$. $\boxed21$ - AMAZONAWS

📅 March 11, 2026 👤 scraface

Mar 11, 2026

$Solution: To find the GCF of 42 and 63, factor both numbers. $42 = 2 \times 3 \times 7$ and $63 = 3^2 \times 7$. The common prime factors are $3$ and $7$. Multiply them: $3 \times 7 = 21$. $\boxed{21}$$