CREST Mental Maths Olympiad Class 12 Previous Year Papers

Q.1

What is the value of x + y + w?

Q.2

Which number is divisible by 17?
123445, 133365, 32376, 245346

Q.3

Simplify the expression:
(−5 + 72) [3 − (−6)3] + (−11 − 2)(8 − 12).

Q.4

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.5

What will be the volume of a cylindrical tank whose radius is 7 cm and height is 5 cm?

Q.6

Simplify:

x² − 13x − 42 = (x − 6) (x − 7)

Q.7

What is the quadratic equations whose roots are 3 and 4?

Q.8

A began a business with $4500 and was joined afterwards by B with $3000. When did B join if the profits at the end of the year were divided in the ratio 2 : 1?

Q.9

What will come in place of question mark (?) in the following equation? (approx.)
1599 × 199 ÷ 49 – 1398 + 3877 = ?

Q.10

Ten years ago, father was 4 times as old as his son. After 10 years, the father will be twice as old as his son. What is the present age of son?