IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 506 - 515 of 1042

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Question 506

Question

MCQ▾

A can do a work in 3 days. If B is 25 % less efficient than A, then in how many days can B do the same work?

Choices

Choice (4)Response

a.

3.5

b.

4

c.

5

d.

3

Question 507

Question

MCQ▾

The ratio of boys and girls in a school of 910 students is . How many girls should be admitted to make ratio ?

Choices

Choice (4)Response

a.

260

b.

240

c.

130

d.

210

Question 508

Question

MCQ▾

If , then is________.

Choices

Choice (4)Response

a.

b.

c.

d.

Question 509

Question

MCQ▾

The value of when is________.

Choices

Choice (4)Response

a.

4

b.

5

c.

2

d.

1

Question 510

Question

MCQ▾

The standard form of 0.003445 is________.

Choices

Choice (4)Response

a.

b.

c.

d.

Question 511

Question

MCQ▾

If and , then the value of is ________.

Choices

Choice (4)Response

a.

75

b.

15

c.

85

d.

65

Question 512

Question

MCQ▾

The value of is ________.

Choices

Choice (4)Response

a.

8044

b.

1024

c.

4450

d.

2044

Question 513

Question

MCQ▾

The value of

Choices

Choice (4)Response

a.

17

b.

11

c.

15

d.

16

Question 514

Question

MCQ▾

Two numbers are in the ratio 5: 7. If each number is increased by 14, the ratio becomes 7: 9. The numbers are________.

Choices

Choice (4)Response

a.

35,25

b.

25,35

c.

35,49

d.

35,47

Question 515

Question

MCQ▾

Number of prime factors in is

Choices

Choice (4)Response

a.

72

b.

70

c.

55

d.

73