IMO- Mathematics Olympiad Class 8: Questions 116 - 123 of 1029

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Question number: 116

» 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: 117

» Linear Equations in One Variable

MCQ▾

Question

The value of x for which 5x22x+5=52 is_.

Choices

Choice (4) Response

a.

2120

b.

2021

c.

21

d.

20

Question number: 118

» 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: 119

» 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

Question number: 120

» Linear Equations in One Variable

MCQ▾

Question

Solution of the equation 5(2x+1)3(x+1)=5(x2)3(2x1)+9x is_.

Choices

Choice (4) Response

a.

5

b.

9

c.

10

d.

3

Question number: 121

» Square and Square Roots

MCQ▾

Question

Squares of an even numbers is always________.

Choices

Choice (4) Response

a.

Even

b.

Odd

c.

All of the above

d.

None of the above

Question number: 122

» Square and Square Roots

MCQ▾

Question

If 2(x3)2=288 , then x can be

Choices

Choice (4) Response

a.

12

b.

11

c.

13

d.

15

Question number: 123

» Square and Square Roots

MCQ▾

Question

Square root of 2401 is________.

Choices

Choice (4) Response

a.

76

b.

78

c.

49

d.

87

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