IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 114 - 121 of 1042

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Question 114

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Question

MCQ▾

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 115

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Question

MCQ▾

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 116

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Question

MCQ▾

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 117

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Question

MCQ▾

The value of for which is_.

Choices

Choice (4)Response
a.21
b.
c.20
d.

Question 118

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Question

MCQ▾

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 119

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Question

MCQ▾

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 120

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Question

MCQ▾

Solution of the equation is_.

Choices

Choice (4)Response
a.5
b.9
c.10
d.3

Question 121

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Question

MCQ▾

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