# IMO- Mathematics Olympiad Class 8: Questions 796 - 801 of 1029

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## Question number: 796

MCQ▾

### Question

The average age of 5 students is 70 years and their ages are in proportion 3: 5: 7: 9: 11, the age of youngest girl is________.

### Choices

Choice (4) Response

a.

40 years

b.

10 years

c.

30 years

d.

35 years

## Question number: 797

MCQ▾

### Question

Manoj earns 25000 per month. He spends on household items and on education of his children. The amount he saves is________.

### Choices

Choice (4) Response

a.

Rs. 6700

b.

Rs. 5370

c.

Rs. 20, 220

d.

Rs. 10, 000

## Question number: 798

MCQ▾

### Question

The ratio of boys and girls in Reena’s classes is 2: 3. Which of the following ratio is not equivalent to 2: 3?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 799

MCQ▾

### Question

Find the compound interest on Rs. 10, 000 in 2 years at 4 % per annum, the interest being compounded half-yearly

### Choices

Choice (4) Response

a.

Rs. 824.32

b.

Rs. 885.20

c.

Rs. 800

d.

Rs 825.23

## Question number: 800

MCQ▾

### Question

Sixty- five percent of a number is 21 less than four- fifth of that number. What is the number?

### Choices

Choice (4) Response

a.

140

b.

100

c.

150

d.

160

## Question number: 801

MCQ▾

### Question

At 12 noon, Nisha recorded the temperature as. The temperature had increased by from 10 A. M. The temperature at 8 A. M. was warmer than it was at 10 A. M. what was the temperature at 8 A. M?

### Choices

Choice (4) Response

a.

b.

c.

d.

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