What is the HCF of 1.2, 0.36 and 2.4?

Explanation

1. 01

   Make the decimal places equal: 1.20, 0.36, 2.40.

2. 02

   Drop the decimal point: 120, 36, 240. Their HCF is 12.

3. 03

   Put back two decimal places: $\operatorname{HCF} = 0.12$.