Question

16. (a) Find the Highest Common Factor (HCF) of 30 and 42.

Answer 1

Answer: 6

Step-by-step explanation: By checking the factors of both numbers, you see that 6 is their greatest common factor.

30: 1, 2, 3, 5, 6, 10, 15, 30

42: 1, 2, 3, 6, 7, 14, 21, 42

Hope this helps!

Answer 2

Given : Two numbers 30 & 42 is given to us .

To Find : The HCF of 30 & 42 .

Solution : HCF is the highest number which divides the given two or more numbers without leaving any remainder .

So , let's find HCF ( Highest common factor ) by Division method :

= 30 ) 42 ( 1

- 30

__________

12 ) 30 ( 2

- 24

___________

6 ) 12 ( 2

- 12

___________

0 .

The last divisor is 6 .

Hence the HCF is 6.