Question

Kate is stuck on the very first question of a maths test." Find the HCF of 15 and 30."
Help her by choosing the correct answer from the below choices.

• A. 3
• B. 15
• C. 5
• D. 10

Answer 1

The correct option is B

15

To help Kate, we need to find the HCF of 15 and 30.
For this we can use any one of the two methods.
i. HCF by Prime factorisation
ii. HCF by Division method

This is the division method of finding HCF.
The last divisor which gives the remainder as 0 is the required HCF.
Hence the HCF is 15.