Mathematics-Direct and Inverse Proportions [NSTSE (National Science Talent Search Exam- Unified Council) Class 8]: Questions 1 - 8 of 90

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Question 1

Direct and Inverse Proportions
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Question

MCQ▾

42 men can complete a piece of work in 6 days. How many men can complete the same work in 18 days?

Choices

Choice (4)Response
a.12
b.126
c.18
d.14

Question 2

Direct and Inverse Proportions
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Question

MCQ▾

If , and , then the ratio of is:

Choices

Choice (4)Response
a.
b.
c.
d.

Question 3

Direct and Inverse Proportions
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Question

MCQ▾

The ratio of third proportional to 24 and 60 and the mean proportional between 18 and 50 is:

Choices

Choice (4)Response
a.3: 2
b.1: 5
c.5: 3
d.5: 1

Question 4

Direct and Inverse Proportions
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Question

MCQ▾

x varies inversely as square of y. Given that for . The value of x for will be equal to:

Choices

Choice (4)Response
a.3
b.
c.
d.

Question 5

Direct and Inverse Proportions
Edit

Question

MCQ▾

If , then is equal to:

Choices

Choice (4)Response
a.
b.
c.
d.

Question 6

Direct and Inverse Proportions
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Question

MCQ▾

A supplier undertook to do a certain piece of work in 36 days. He employed certain number of men, but 8 of them being absent from the very first day, the rest could finish the work in 54 days. The numbers of men originally employed were:

Choices

Choice (4)Response
a.16
b.8
c.36
d.24

Question 7

Direct and Inverse Proportions
Edit

Question

MCQ▾

If , then is equal to:

Choices

Choice (4)Response
a.
b.
c.
d.

Question 8

Direct and Inverse Proportions
Edit

Question

MCQ▾

If the price of 15 pens is Rs. 187.5, what will be the approximate price of 18 pens?

Choices

Choice (4)Response
a.225
b.215
c.154.5
d.275.5