CREST Mental Maths Olympiad Class 12 Previous Year Papers

Q.1

Which number is divisible by 2 and 8?
23462, 773292, 204120, 956482

Q.2

A wire is in the shape of a square of side 44 cm. If it is refolded into a circular ring, find the radius of the ring.

Q.3

Find the radius of the largest right circular cone that can be cut out of a cube whose edge is 9 cm.

Q.4

Simplify:

17/29 x 8/102 x 48/27 x 3/2 = ?

Q.5

What is the range for the following data set:

1, 2, 8, 9, 7, 4, 1, 1, 3, 2, 3

Q.6

Solve:
(7³ + 20) x (3⁵ ÷ 3⁰)

Q.7

The line graph shows the number of candidates applied for post P and post Q of a company between 2012 to 2017.
The number of candidates who applied for the post P in 2015 is approximately what percent of the total number of candidates who applied for post Q in all the years?

Q.8

Factorise:

x(x² + y² −z²) − z(x² + y² −z²)

Q.9

Which number is divisible by 19?
650864, 345645, 2753533, 887773

Q.10

A man can row at 12 km/hr and downstream at 12 km/hr. Find man's rate in still water.