Question

What is the GCF of 42 and 70

Answer 1

To find the GCF of 42 and 70,

List the prime factors of each numbers,

The prime factors of 42 and 70 is

`\begin{gathered} 42\Rightarrow2*3*7 \\ 70\Rightarrow2*5*7 \end{gathered}`

42 and 70 share the common factors below

`2\text{ and 7}`

Multiply the common factors to find the GCF

The GCF of 42 and 70 will be

`\text{GCF}=2*7=14`

Hence, the GCF of 42 and 70 is 14