IMO- Mathematics Olympiad Class 8: Questions 546 - 552 of 1029

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Question number: 546

» Exponents and Powers

MCQ▾

Question

The solution of 2x.210=24x , is________.

Choices

Choice (4) Response
a.

-2

b.

4

c.

3

d.

-1

Question number: 547

» 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: 548

» Exponents and Powers

MCQ▾

Question

The value of 52000+519995199951997 , is________.

Choices

Choice (4) Response
a.

254

b.

54

c.

2514

d.

2521

Question number: 549

» 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: 550

» Exponents and Powers

MCQ▾

Question

Which of the following values are equal?

(1) 10 (2) 30 (3) 05 (4) 31

Choices

Choice (4) Response
a.

2 and 3

b.

1 and 2

c.

1 and 3

d.

1 and 4

Question number: 551

» Exponents and Powers

MCQ▾

Question

Simplify: (xaxb)(a2+b2+ab)×(xbxc)(b2+c2+cb)×(xcxa)(c2+a2+ca)

Choices

Choice (4) Response
a.

(a+b+c)3

b.

1

c.

(a2+b2+c2)

d.

(a+b+c)

Question number: 552

» Exponents and Powers

MCQ▾

Question

Given that 100.35=x,100.80=y and xz=y2 , then the value of z is (approximately) ________.

Choices

Choice (4) Response
a.

4.21

b.

4.00

c.

4.39

d.

4.57

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