# IMO- Mathematics Olympiad Class 8: Questions 818 - 823 of 1029

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## Question number: 818

MCQ▾

### Question

If students of a class of strength 200 are girls, then number of boys equals________.

### Choices

Choice (4) Response
a.

150

b.

130

c.

160

d.

110

## Question number: 819

MCQ▾

### Question

At 7.00 am, the temperature was -6 F, The temperature was 7 F higher at noon. Which one of the following expression can be used to calculate the temperature at noon?

### Choices

Choice (4) Response
a.

b.

c.

d. None of the above

## Question number: 820

Appeared in Year: 2012

MCQ▾

### Question

The ratio of present ages of Rahul and Deepesh is 3: 5.10 years later this ratio becomes 5: 7. What is the present age of Deepesh?

### Choices

Choice (4) Response
a.

10 years

b.

20 years

c.

25 years

d.

15 years

## Question number: 821

MCQ▾

### Question

Priya goes to a shop to buy a dress costing Rs. 2000 including sales tax of 10%. He asks the shopkeeper to reduce the price of the watch so that he can save an amount equal to the sales tax. The reduction in the price of the dress is________.

### Choices

Choice (4) Response
a.

Rs 200

b.

Rs 150

c.

Rs 250

d. Question does not provide sufficient data or is vague

## Question number: 822

MCQ▾

### Question

At what rate percent per annum will a sum of money double in 10 years?

### Choices

Choice (4) Response
a.

15%

b.

5%

c.

10%

d.

20%

## Question number: 823

MCQ▾

### Question

The ratio of two numbers is 1: 2. Which of the following ratio is equivalent to 1: 2?

### Choices

Choice (4) Response
a.

b.

c.

d.