# Linear Equations in One Variable (IMO- Mathematics Olympiad Class 8): Questions 52 - 58 of 61

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## Question number: 52

» Linear Equations in One Variable

MCQ▾

### Question

Rohit was 4 times as old as his son 8 years ago. After 8 years, Rohit will be twice as old as his son. What are their present ages?

### Choices

Choice (4) Response

a.

20 years, 50 years

b.

10 years, 30 years

c.

15 years, 35 years

d.

16 years, 40 years

## Question number: 53

» Linear Equations in One Variable

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

30

b.

50

c.

40

d.

60

## Question number: 54

» Linear Equations in One Variable

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: 55

» Linear Equations in One Variable

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.

26

b.

46

c.

62

d.

64

## Question number: 56

» Linear Equations in One Variable

MCQ▾

### Question

The value of for which is_.

### Choices

Choice (4) Response

a.

b.

c.

21

d.

20

## Question number: 57

» Linear Equations in One Variable

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, 20m

b.

30m, 20m

c.

55m, 30m

d.

20m, 50m

## Question number: 58

» Linear Equations in One Variable

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.

25 years

c.

22 years

d.

20 years

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