# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 115 - 124 of 1040

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## Question number: 115

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MCQ▾

### Question

If the angles of a triangle are in the ratio 3: 2: 1, then the difference between the greatest and smallest angles is_.

### Choices

Choice (4)Response

a.

b.

c.

d.

60

## Question number: 116

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MCQ▾

### Question

A number consists of two digits whose sum is 10. If 18 is added to the number, the digits are interchanged. The number is_.

### Choices

Choice (4)Response

a.

62

b.

26

c.

64

d.

46

## Question number: 117

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MCQ▾

### Question

The value of for which is_.

### Choices

Choice (4)Response

a.

21

b.

c.

20

d.

## Question number: 118

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MCQ▾

### Question

The length of a rectangle is 5 m less than three times its breadth. The length and breadth of the rectangle if its perimeter is 150 m, is_.

### Choices

Choice (4)Response

a.

55m, 30m

b.

20m, 50m

c.

55m, 20m

d.

30m, 20m

## Question number: 119

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MCQ▾

### Question

A man is 6 years older than his wife and his wife is now thrice as old as their daughter, who is 10 years old. How old the man when his daughter was born?

### Choices

Choice (4)Response

a.

26 years

b.

20 years

c.

22 years

d.

25 years

## Question number: 120

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MCQ▾

### Question

Solution of the equation is_.

### Choices

Choice (4)Response

a.

5

b.

9

c.

10

d.

3

## Question number: 121

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MCQ▾

### Question

Squares of an even numbers is always________.

### Choices

Choice (4)Response

a.

Odd

b.

Even

c.

All of the above

d.

None of the above

## Question number: 122

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MCQ▾

If , then can be

### Choices

Choice (4)Response

a.

13

b.

12

c.

11

d.

15

## Question number: 123

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MCQ▾

### Question

Square root of 2401 is________.

### Choices

Choice (4)Response

a.

87

b.

78

c.

49

d.

76

## Question number: 124

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MCQ▾

### Question

A number is multiplied by itself and then 15 is subtracted from the product. If the final result is 2545, then find the original number.

### Choices

Choice (4)Response

a.

30

b.

31

c.

13

d.

32

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