CREST Mental Maths Olympiad Class 9 Previous Year Papers

Q.1

The base radius of a cylinder is 20 cm and its height is 10 cm. Find its curved surface area in cm².

Q.2

Two circle touch internally. The sum of their area is 116π cm² and distance between their centre is 6 cm. Then, what is the radii of the circles?

Q.3

In the given figure, PQRS is a rectangle. Find PR + QS.

Q.4

In a pack of 52 cards, what is the probability of getting a face card?

Q.5

ΔABC and ΔDEC are the right triangles with ∠B = ∠E = 90°, find BE.

Q.6

Five years ago, the average age of P and Q was 15 years. Now, the average age of P, Q and R is 20 years. What would be the age of R after 10 years?

Q.7

What is the product of Zero’s of polynomials (x + 8) (x − 10)?

Q.8

What will be the volume of tank whose length is 10 m, breadth 8 m and height 6 m?

Q.9

Find the value of (125)^2/9.

Q.10

What is the value of x, if the median of the following data is 27.5?
              24, 25, 26, x + 2, x + 3, 30, 33, 37