Step-by-step explanation:

Actually in case of maths there is no sum that is important. The question paper setters asked based the concepts and its applications on the topic.

the lessons are:-

Construction

Linear equations

Surface area ( Keep all the formulae in your mind without confusing )

Circles, Areas of parallelograms and triangles and Quadrilaterals ( Keep all the theorems in your mind )

Others I hope you can read on your own.

Some relevantly asked concepts......

Sums based on cyclic quadrilaterals

Sums based on parallelograms with same base and same parallels.

Sums based on mean of the observation.

Sums based on Linear equation ( definite graph )

Sums based on all exercises of surface area

and others.

I hope you got the answer for your