IMO- Mathematics Olympiad Class 8: Questions 64 - 69 of 1029

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Question number: 64

» Linear Equations in One Variable

MCQ▾

Question

Two angles in a triangle in the ratio 2: 5. If the sum of these angles is equal to the third angle, then the third angle is_.

Choices

Choice (4) Response
a.

60°

b.

180°

c.

90°

d.

45°

Question number: 65

» Linear Equations in One Variable

MCQ▾

Question

Find three summing consecutive, whose sum is 90.

Choices

Choice (4) Response
a.

29, 30, 31

b.

30, 31, 32

c.

25, 26, 27

d.

92, 91, 90

Question number: 66

» Linear Equations in One Variable

MCQ▾

Question

Ram has Rs. 30 in the form of fifty paise and twenty five paise coins. He has twice as many twenty five paise coins as he has fifty paise coins. The number of coins of each kind are_.

Choices

Choice (4) Response
a.

10 and 30

b.

20 and 50

c.

30 and 60

d.

15 and 30

Question number: 67

» Linear Equations in One Variable

MCQ▾

Question

Two angles in a triangle in the ratio 2: 3. If the sum of these angles is equal to the third angle, then the third angle is_.

Choices

Choice (4) Response
a.

60°

b.

90°

c.

180°

d.

45°

Question number: 68

» Linear Equations in One Variable

MCQ▾

Question

The length of a rectangle is 6 m more than twice of its breadth. The length and breadth of the rectangle if its perimeter is 162 m, is_.

Choices

Choice (4) Response
a.

55m, 30m

b.

56m, 25m

c.

55m, 20m

d.

48m, 22m

Question number: 69

» Linear Equations in One Variable

MCQ▾

Question

A motor boat covers a certain distance downstream in a river in 3 hours. It covers the same distance upstream in 3 and half hours. The speed of the water is 1.5 km/hr. The speed of the boat in still water is_.

Choices

Choice (4) Response
a.

19.5 km/hr

b.

10 km/hr

c.

5 km/hr

d.

11 km/hr

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