# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 831 - 836 of 1042

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## Question 831

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### Question

MCQ▾

Dishant gets 2 marks for each correct answer and loses 1 marks for each wrong answer. He attempts 60 problems and obtains 15 marks. The number of problem solved correctly is________.

### Choices

Choice (4)Response
a.25
b.21
c.18
d.10

## Question 832

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### Question

MCQ▾

If students of a class of strength 90 are girls, then number of boys equals________.

### Choices

Choice (4)Response
a.10
b.40
c.50
d.30

## Question 833

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### Question

MCQ▾

Vimal is traveling at an average rate of 40 miles per hour. How far does he travel in 1 hours?

### Choices

Choice (4)Response
a.100 miles
b.50 miles
c.60 miles
d.20 miles

## Question 834

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### Question

MCQ▾

The average age of 4 boys is 25 years and their ages are in proportion 1: 2: 3: 4, the age of youngest girl is________.

### Choices

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

## Question 835

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### Question

MCQ▾

Two pens and three pencils cost Rs. 80. Four pens and a pencils cost Rs. 112. Find the cost of the pen.

### Choices

Choice (4)Response
a.11
b.25
c.30
d.35

## Question 836

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### Question

MCQ▾

The total area of a semicircle and a rectangle is equal to 177 sq. cm. The diameter of the circle is 14 cm and the length of the rectangle is 20 cm. The perimeter of a rectangle is________.

### Choices

Choice (4)Response
a.60 cm
b.40 cm
c.50 cm
d.55 cm