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Chapter 4: Q2. (page 177)

Find the greatest common factor of the numbers

21,42

Short Answer

Expert verified

The greatest common factor is 21.

Step by step solution

01

Step -1 - Apply the concept of Factorization

In this, simply use the concept of factorization of the numbers and to get the common number from the both and do the multiplication if two numbers comes out.

02

Step -2 – Find the Factorization

Here, the numbers are 21,42.

Factorization of 21 is 21=3脳7.

Factorization of 42 is 42=2脳3脳7.

03

Step -3 – Finding the common factor

Now, from the above factorization, the common multiple is 3脳7.

So, the greatest common factor is 3脳7=21.

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