# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 67 - 72 of 1040

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## Question number: 67

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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.

b.

c.

d.

## Question number: 68

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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.

56m, 25m

b.

48m, 22m

c.

55m, 30m

d.

55m, 20m

## Question number: 69

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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.

11 km/hr

b.

5 km/hr

c.

10 km/hr

d.

19.5 km/hr

## Question number: 70

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MCQ▾

### Question

Of a number multiplied by of the same number make 25. The number is_.

### Choices

Choice (4) Response

a.

10

b.

1

c.

1000

d.

100

## Question number: 71

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MCQ▾

### Question

There were only two candidates in an election. One got 72 % votes and was elected by a margin of 880 votes. The total number of voters were_.

### Choices

Choice (4) Response

a.

500

b.

2000

c.

3000

d.

1000

## Question number: 72

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MCQ▾

### Question

The sum of two numbers is 13 and difference of their squares is 13. The difference of the numbers is?

### Choices

Choice (4) Response

a.

3

b.

0

c.

1

d.

2