# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 67 - 72 of 1042

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## Question 67

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### Question

MCQ▾

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 68

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### Question

MCQ▾

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 69

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### Question

MCQ▾

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 70

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### Question

MCQ▾

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 71

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### Question

MCQ▾

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 72

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### Question

MCQ▾

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