IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 114 - 120 of 1040

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Question number: 114

» Linear Equations in One Variable

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MCQ▾

Question

If of a number is 20 less than the original number, then the number is_.

Choices

Choice (4) Response

a.

50

b.

40

c.

60

d.

30

Question number: 115

» Linear Equations in One Variable

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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

» Linear Equations in One Variable

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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

» Linear Equations in One Variable

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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

» Linear Equations in One Variable

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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

» Linear Equations in One Variable

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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

» Linear Equations in One Variable

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MCQ▾

Question

Solution of the equation is_.

Choices

Choice (4) Response

a.

5

b.

9

c.

10

d.

3