IMO Level 2- Mathematics Olympiad (SOF) Class 9: Questions 87 - 90 of 109

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Question 87

Appeared in Year: 2013

Question

MCQ▾

A large solid sphere of diameter 15 m is melted and recast into several small spheres of diameter 3 m. What is the percentage increase in the surface area of the smaller spheres over that of the large sphere?

Choices

Choice (4)Response

a.

Can ′ t be determined

b.

c.

d.

Question 88

Appeared in Year: 2013

Question

MCQ▾

Select a figure from amongst the given options which will continue the same series as established by the five Problem Figures.

Problem Figures

Choices

Choice (4)Response

a.

Problem Figures

b.

Problem Figures

c.

Problem Figures

d.

Problem Figures

Question 89

Appeared in Year: 2013

Question

MCQ▾

Each of the vowels in the word ′ MAGNIFY is replaced by number ′ 2 ′ and each consonant is replaced by a number which is the serial number of that consonant in the word, i.e.. , M by 1, G by 3 and so on. What is the total of all the numbers once the replacement is completed?

Choices

Choice (4)Response

a.

26

b.

25

c.

24

d.

Question 90

Appeared in Year: 2013

Question

MCQ▾

A, B, C, D, E, F, G, H and I are nine houses. C is 2 km east of B. A is 1 km north of B and H is 2 km south of A. G is 1 km west of H while D is 3 km east of G and F is 2 km north of G. I is situated just in middle of B and C while E is just in middle of H and D. Distance between A and F is ________.

Choices

Choice (4)Response

a.

3 km

b.

2 km

c.

1.41 km

d.

1 km