Chapter 4.1, Problem 85CCR

To determine

Find the greatest common factor

Answer to Problem 85CCR

The greatest common factor is $3$ .

Explanation of Solution

Given information: Given the pair of numbers $57\text{ and 6}3$

Calculation:

To get the GCF of each pair of numbers, list down their prime factors and multiply their common factors.

  $\begin{array}{l}57=3\times 19\mathrm{.....}\left(1\right)\\ 63=3\times 3\times 7\mathrm{.....}\left(2\right)\end{array}$

Note that the common factors of this pair of numbers are $3;$

Therefore its GCF is $3$ .

Thus, the greatest common factor is $3$ .