IMO- Mathematics Olympiad Class 8: Questions 577 - 583 of 1029

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Question number: 577

» Exponents and Powers

MCQ▾

Question

If 115×5x5x1=50 , then the value of x is________.

Choices

Choice (4) Response

a.

2

b.

4

c.

1

d.

3

Question number: 578

» Exponents and Powers

MCQ▾

Question

When simplified, (x1+y1)1 is equal to________

Choices

Choice (4) Response

a.

1xy1+xy

b.

xy

c.

xyx+y

d.

x1xy

Question number: 579

» Exponents and Powers

MCQ▾

Question

Number of prime factors in (512)13×(1024)13×(1728)13 is

Choices

Choice (4) Response

a.

4

b.

9

c.

6

d.

8

Question number: 580

» Direct and Inverse Proportions

MCQ▾

Question

A man completes 13 of a job in 12 days. At this rate how many more days will it take him to finish the job?

Choices

Choice (4) Response

a.

27

b.

26

c.

24

d.

23

Question number: 581

» Direct and Inverse Proportions

MCQ▾

Question

A can do a piece of work in 20 days and B can do alone it in 10 days. B works at it for 5 days and then leaves. A alone can finish the remaining work in________.

Choices

Choice (4) Response

a.

11 days

b.

10 days

c.

10.5 days

d.

5 days

Question number: 582

» Direct and Inverse Proportions

MCQ▾

Question

Two numbers are in the ratio 7: 9. If each number is increased by 18, the ratio becomes 9: 11. The numbers are________.

Choices

Choice (4) Response

a.

35, 81

b.

63, 85

c.

65, 35

d.

63, 81

Question number: 583

» Direct and Inverse Proportions

MCQ▾

Question

A bag contains 50 paise, 25 paise and 10 paise coins in the ratio 1: 2: 3. If their total value is Rs. 26, the number of 50 paise coins is ________.

Choices

Choice (4) Response

a.

80

b.

20

c.

30

d.

50

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