Hi!

CLAT does not necessarily requires candidate to opt for maths in their 11th and 12th grade.

CLAT paper consists of 5 sections;

1. English

2. General Knowledge and current affairs

3.  Elementary Maths

4.  Legal Aptitude

5.  Logical reasoning

If you have took mathematics in 11th and12th grade,  definitely you will get an ace over the paper.

Maths section will possibly help you to boost you score in exam.

For more details about exam refer this:

https://law.careers360.com/exams/clat

All the best!

Hope this helps!