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

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## Question 67

### 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

### 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

### 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 . The speed of the boat in still water is_.

### Choices

Choice (4)Response

a.

11

b.

5

c.

10

d.

19.5

## Question 70

### 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

### 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

### 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