CREST Mental Maths Olympiad Class 9 Previous Year Papers

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Syllabus:

Number System
Algebra
Comparing Quantities
Geometry
Mensuration
Playing with Numbers
Data Handling

Q.1 Q.2 Q.3 Q.4 Q.5 Q.6 Q.7 Q.8 Q.9 Q.10

Q.1

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



Q.2

A shopkeeper expects a profit of 50% on his cost price. In a week, his sale was $15000. What was his profit?

Q.3

What are the two roots of the equation (x + 5)² - 36 = 0?

Q.4

A single discount, equivalent to a successive discount of 40% and 30% is:

Q.5

A coin is tossed twice. Find the probability of getting both tails.

Q.6

Find the next number in the sequence:
1, 1, 2, 3, 5, 8, 13, ?

Q.7

Express 3.14 into a mixed fraction.

Q.8

In a ∆PQR, PS = SR = SQ and ∠PRS = 55°. Find ∠SQP.

Q.9

The mean of 11 observations is 50. If the mean of first Six observations is 49 and that of last six observations is 52, then find sixth observation.

Q.10

Study the following table to answer the given question?
In City E, the number of Specialist officer is approximately what percent of that officer?

Center/Post Officer Clerk Field Officer Supervisor Specialist
City A 2000 5000 50 2050 750
City B 15000 17000 160 11000 750
City C 17000 19500 70 7000 900
City D 3500 20000 300 90000 1150
City E 14900 17650 70 1300 1200
City F 11360 15300 30 1500 650
City G 9000 11000 95 1650 500

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Answers to Previous Year Questions from CREST Olympiads:

Q.1dQ.2aQ.3aQ.4bQ.5cQ.6dQ.7cQ.8cQ.9aQ.10a

Answers to Previous Year Questions from CREST Olympiads:

Q.1 : d | Q.2 : a | Q.3 : a | Q.4 : b | Q.5 : c | Q.6 : d | Q.7 : c | Q.8 : c | Q.9 : a | Q.10 : a

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