IMO- Mathematics Olympiad Class 8: Questions 538 - 545 of 1029

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Question number: 538

» Direct and Inverse Proportions

MCQ▾

Question

The ratio of boys and girls in a school of 650 students is 6:7 . How many boys should be admitted to make ratio 1:1 ?

Choices

Choice (4) Response
a.

140

b.

130

c.

150

d.

120

Question number: 539

» Exponents and Powers

MCQ▾

Question

The value of (1)3+(2)3+(3)3

Choices

Choice (4) Response
a.

7

b.

1

c.

5

d.

6

Question number: 540

» Exponents and Powers

MCQ▾

Question

The value of (400)32 is ________.

Choices

Choice (4) Response
a.

100

b.

200

c.

800

d.

400

Question number: 541

» Direct and Inverse Proportions

MCQ▾

Question

The ratio which (14ofRs8.40) bears to (0.5of2.50) is________.

Choices

Choice (4) Response
a.

1.50

b.

1.65

c.

1.68

d.

1.78

Question number: 542

» Direct and Inverse Proportions

MCQ▾

Question

If x:y=2:3 and 3:x=1:2 , then the value of y is ________.

Choices

Choice (4) Response
a.

10

b.

6

c.

8

d.

9

Question number: 543

» Direct and Inverse Proportions

MCQ▾

Question

A sum of money is sufficient to pay As wages for 25 days and Bs wages for 25 days. The same money is sufficient to pay the wages of both for ________.

Choices

Choice (4) Response
a.

11 days

b.

1212 days

c.

10 days

d.

12 days

Question number: 544

» Direct and Inverse Proportions

MCQ▾

Question

A bag contains 25 paise, 10 paise and 5 paise coins in the ratio 1: 4: 5. If their total value is Rs. 90, the number of 10 paise coins is ________.

Choices

Choice (4) Response
a.

400

b.

500

c.

800

d.

600

Question number: 545

» Direct and Inverse Proportions

MCQ▾

Question

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

Choices

Choice (4) Response
a.

24: 15

b.

25: 14

c.

3: 20

d.

20: 3

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