Direct and Inverse Proportions (IMO- Mathematics Olympiad Class 8): Questions 21 - 27 of 62

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Question number: 21

» Direct and Inverse Proportions

MCQ▾

Question

A grocer has just enough money to buy 50 kilo rice worth Rs. 70.00 per kilogram. If cost of the rice is Rs. 10.00 more, then how much rice, he will be able to buy with that amount of money, is________.

Choices

Choice (4) Response

a.

40 Kg

b.

42 Kg

c.

44 Kg

d.

35 Kg

Question number: 22

» Direct and Inverse Proportions

MCQ▾

Question

Pipe A can fill an empty tank in 4 hours while pipe B can empty the full tank in 3 hours. If both are opened in the empty tank, time taken to empty it up completely is ________.

Choices

Choice (4) Response

a.

11 hours

b.

13 hours

c.

15 hours

d.

12 hours

Question number: 23

» Direct and Inverse Proportions

MCQ▾

Question

The weight of a 11 m long iron rod is 15 kg. The weight of 5 m long of such rod will be________.

Choices

Choice (4) Response

a.

8.5 kg

b.

6.5 kg

c.

6.8 kg

d.

8 kg

Question number: 24

» Direct and Inverse Proportions

MCQ▾

Question

The ratio of boys and girls in a school of 650 students is 6:7 . How many boys should be admitted to make ratio 1:1 ?

Choices

Choice (4) Response

a.

140

b.

130

c.

150

d.

120

Question number: 25

» Direct and Inverse Proportions

MCQ▾

Question

The ratio which (14ofRs8.40) bears to (0.5of2.50) is________.

Choices

Choice (4) Response

a.

1.50

b.

1.65

c.

1.68

d.

1.78

Question number: 26

» Direct and Inverse Proportions

MCQ▾

Question

If x:y=2:3 and 3:x=1:2 , then the value of y is ________.

Choices

Choice (4) Response

a.

10

b.

6

c.

8

d.

9

Question number: 27

» Direct and Inverse Proportions

MCQ▾

Question

A sum of money is sufficient to pay As wages for 25 days and Bs wages for 25 days. The same money is sufficient to pay the wages of both for ________.

Choices

Choice (4) Response

a.

11 days

b.

1212 days

c.

10 days

d.

12 days

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