IMO- Mathematics Olympiad (SOF) Class 8: Questions 498 - 505 of 1029

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Question number: 498

» Direct and Inverse Proportions

MCQ▾

Question

A bag contains 25 paise, 10 paise and 5 paise coins in the ratio 2: 3: 4. If their total value is Rs. 20, the number of 5 paise coins is ________.

Choices

Choice (4) Response

a.

50

b.

80

c.

60

d.

70

Question number: 499

» Exponents and Powers

MCQ▾

Question

If and, then is equal to________.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 500

» Direct and Inverse Proportions

MCQ▾

Question

Two numbers are in the ratio 1: 3. If each number is increased by 9, the ratio becomes 3: 5. The numbers are________.

Choices

Choice (4) Response

a.

13,14

b.

3.5,14.7

c.

35,25

d.

4.5,13.5

Question number: 501

» Exponents and Powers

MCQ▾

Question

The value of is ________.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 502

» Direct and Inverse Proportions

MCQ▾

Question

The ratio of boys and girls in a school of 660 students is. How many girls should be admitted to make ratio?

Choices

Choice (4) Response

a.

50

b.

60

c.

40

d.

30

Question number: 503

» Direct and Inverse Proportions

MCQ▾

Question

can do a piece of work in 50 days. He works at it for 5 days and then alone finishes the work in 30 days. The two together could have completed the work in ________.

Choices

Choice (4) Response

a.

17.5 days

b.

17 days

c.

18 days

d.

17.2 days

Question number: 504

» Exponents and Powers

MCQ▾

Question

Number of prime factors in is

Choices

Choice (4) Response

a.

3

b.

4

c.

2

d.

6

Question number: 505

» Exponents and Powers

MCQ▾

Question

If, then the value of is________.

Choices

Choice (4) Response

a.

1

b.

3

c.

4

d.

2

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