Question

Find the HCF of 144 and 198.....

Answer 1

Firstly take hcf of both separately and see the common and write one if the no. are common and leave other no. and multiply this like that.

Answer 2

Answer: HCF of 144 and 198 is 18.  

Solution:  

The largest number which divides the given two or more numbers exactly is known as Highest Common Factor.

HCF of 144 =$2 \times 2 \times 2 \times 2 \times 3 \times 3$

HCF of 198 =$2 \times 3 \times 3 \times 11$

HCF is highest common factor, hence consider the common terms in 144 and 198

HCF of 144 and 90 = $\bold{3 \times 3 \times 2}$=18  

In given problem 18 is the HCF which divides the numbers 144 and 198 exactly.