Chapter 4, Problem 16CR

To determine

To find the greatest common factor of 15,42& 63

Answer to Problem 16CR

3

Explanation of Solution

Given information:

Numbers 15,42& 63

Formula Used: Factorization

Calculation:

Here, break both the numbers into its factors respectively.

So, 15 may be written as $3\times 5$

And 42 may be written as $7\times 3\times 2$

And 63 may be written as $7\times 3\times 3$

As can see that 3 is common in all the numbers.Hence , the greatest common factor is 3.

Conclusion-

3