Direct and Inverse Proportions (IMO- Mathematics Olympiad Class 8): Questions 28 - 34 of 62

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Question number: 28

» Direct and Inverse Proportions

MCQ▾

Question

A bag contains 25 paise, 10 paise and 5 paise coins in the ratio 1: 4: 5. If their total value is Rs. 90, the number of 10 paise coins is ________.

Choices

Choice (4) Response

a.

400

b.

500

c.

800

d.

600

Question number: 29

» Direct and Inverse Proportions

MCQ▾

Question

If A: B = 1: 4 and B: C = 3: 5, then C: A is equal to, ________.

Choices

Choice (4) Response

a.

24: 15

b.

25: 14

c.

3: 20

d.

20: 3

Question number: 30

» Direct and Inverse Proportions

MCQ▾

Question

A can do a piece of work in 70 days. He works at it for 7 days and then B alone finishes the work in 40 days. The two together could have completed the work in ________.

Choices

Choice (4) Response

a.

30 days

b.

23.8 days

c.

20.5 days

d.

23 days

Question number: 31

» Direct and Inverse Proportions

MCQ▾

Question

Two pipes A and B can fill a tank in 12 and 24 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?

Choices

Choice (4) Response

a.

2 minutes

b.

6 minutes

c.

5 minutes

d.

8 minutes

Question number: 32

» Direct and Inverse Proportions

MCQ▾

Question

An agent receives a commission of Rs. 50.00 on sales of Rs. 3500.00. The commission he get on sales of Rs. 300.00 is________.

Choices

Choice (4) Response

a.

Rs 4.00

b.

Rs 3.50

c.

Rs 4.28

d.

Rs 2.87

Question number: 33

» Direct and Inverse Proportions

MCQ▾

Question

If A: B = 2: 3 and B: C = 3: 5, then C: A is equal to, ________.

Choices

Choice (4) Response

a.

2: 3

b.

4: 5

c.

5: 2

d.

5: 4

Question number: 34

» Direct and Inverse Proportions

MCQ▾

Question

0.9 of a number equals 0.03 of another number. The ratio of the number is________.

Choices

Choice (4) Response

a.

10: 3

b.

1: 30

c.

3: 10

d.

3: 20

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