IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 545 - 552 of 1040

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Question number: 545

» Direct and Inverse Proportions

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

25: 14

b.

20: 3

c.

3: 20

d.

24: 15

Question number: 546

» Exponents and Powers

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MCQ▾

Question

The solution of , is________.

Choices

Choice (4) Response

a.

-2

b.

-1

c.

3

d.

4

Question number: 547

» Direct and Inverse Proportions

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

20.5 days

b.

23 days

c.

30 days

d.

23.8 days

Question number: 548

» Exponents and Powers

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MCQ▾

Question

The value of , is________.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 549

» Direct and Inverse Proportions

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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.

5 minutes

b.

6 minutes

c.

2 minutes

d.

8 minutes

Question number: 550

» Exponents and Powers

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MCQ▾

Question

Which of the following values are equal?

(1) (2) (3) (4)

Choices

Choice (4) Response

a.

1 and 4

b.

2 and 3

c.

1 and 3

d.

1 and 2

Question number: 551

» Exponents and Powers

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MCQ▾

Question

Simplify:

Choices

Choice (4) Response

a.

b.

c.

d.

1

Question number: 552

» Exponents and Powers

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MCQ▾

Question

Given that and , then the value of is (approximately) ________.

Choices

Choice (4) Response

a.

4.39

b.

4.00

c.

4.57

d.

4.21