CREST Mental Maths Olympiad Class 12 Previous Year Papers

Q.1

Which number is divisible by 14?
57248, 124556, 89534, 484176

Q.2

In the figure, find the value of CF.

Q.3

A rectangular box 14 cm long, 10 cm wide and 5 cm high is to be made with cardboard. Find the area of cardboard to make that box.

Q.4

How many km/h does a man walk who passes through a street 600 m long in 5 minutes?

Q.5

The banker's gain on a bill due 1 year hence at 15% p.a. is $9. The true discount is:

Q.6

Find the area of a triangle whose sides are 50 m, 78 m, 112 m respectively.

Q.7

The average age of 30 girls is 13 years. The average of first 18 girls is 15 years. Find out the average age of remaining 12 girls.

Q.8

One year ago, the ratio of Harry and Sam age was 6 : 7 respectively. Four years hence their ratio would become 7 : 8. How old is Sam?

Q.9

How many years will it take for the amount of $600 to yield $120 as interest at 10% per annum of simple interest?

Q.10

What will come in place of question mark (?) in the diagram?