Everyday Mathematics (IMO- Mathematics Olympiad Class 9): Questions 38 - 42 of 99

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Question number: 38

» Everyday Mathematics

MCQ▾

Question

In samayra’s opinion, her weight is greater than 40 kg but less than 47 kg. Her brother does not agree with Samayra and he thinks that Samayra’s weight is greater than 35 kg but less than 45 kg. Her mother’s view is that his weight cannot be greater than 43 kg. If all of them are correct in their estimations, what is the average of different probable weights of Samayra?

Choices

Choice (4) Response

a.

32 kg

b.

62 kg

c.

52 kg

d.

42 kg

Question number: 39

» Everyday Mathematics

MCQ▾

Question

If 100 men can do a job in 80 days, in how many days will 120 men do it in ________.

Choices

Choice (4) Response

a.

69 days

b.

67 days

c.

65 days

d.

63 days

Question number: 40

» Everyday Mathematics

MCQ▾

Question

The compound interest on Rs. 80000 at 20% per annum for 9 months, compound quarterly is ________

Choices

Choice (4) Response

a.

Rs. 15610

b.

Rs. 12610

c.

Rs. 14610

d.

Rs. 13610

Question number: 41

» Everyday Mathematics

MCQ▾

Question

A man rows downstream 30 km and upstream 18 km, taking 5 hours each time. The velocity of current is ________

Choices

Choice (4) Response

a.

6 km/hr

b.

1.2 km/hr

c.

3.6 km/hr

d.

2.4 km/hr

Question number: 42

» Everyday Mathematics

MCQ▾

Question

Sumer Singh purchased 100 reams of papers at Rs. 50 per ream. He spent Rs. 250 on transportation, paid octroi at the rate of 30 paise per ream and paid Rs. 60 to the coolie. If he wants to have a gain of 10% , what must be the selling price per ream?

Choices

Choice (4) Response

a.

Rs. 58.74

b.

Rs. 79.45

c.

Rs. 86.65

d.

Rs. 90.64

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