# IMO- Mathematics Olympiad Class 9: Questions 682 - 687 of 919

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## Question number: 682

MCQ▾

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 683

MCQ▾

### Question

The average of n numbers is A. if is replaced by is replaced by , …, then the new average is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 684

MCQ▾

### Question

One quality of wheat at Rs. 9.30 per kg is mixed with another quality at a certain rate in the ratio. If the mixture so formed be worth Rs. 10 per kg, what is the rate per kg of the second quality of wheat?

### Choices

Choice (4) Response

a.

Rs. 10.60

b.

Rs. 10.30

c.

Rs. 11

d.

Rs. 10.80

## Question number: 685

MCQ▾

### Question

A bicycle is sold at a gain of . If it had been sold for Rs. 20 more, would have been gained. The C. P. of the bicycle is ________

### Choices

Choice (4) Response

a.

Rs. 400

b.

Rs. 600

c.

Rs. 500

d.

Rs. 350

## Question number: 686

MCQ▾

### Question

A certain number of men can finish a piece of work in 100 days. If there were 10 men less, it would take 10 days more for the work to be finished. How many men were there originally?

### Choices

Choice (4) Response

a.

147

b.

146

c.

110

d.

75

## Question number: 687

MCQ▾

### Question

The King, queen and jack of clubs are removed from a deck of 52 cards and then well-shuffled. One card id selected from the remaining cards. The probability of getting a black card is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

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