# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 682 - 686 of 931

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## Question 682

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### Question

MCQ▾

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. 11
b.Rs. 10.60
c.Rs. 10.80
d.Rs. 10.30

## Question 683

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### Question

MCQ▾

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. 600
b.Rs. 350
c.Rs. 500
d.Rs. 400

## Question 684

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### Question

MCQ▾

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.146
b.110
c.75
d.147

## Question 685

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### Question

MCQ▾

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.

## Question 686

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### Question

MCQ▾

Average weight of 9 persons is 48 kg. If one man weighing 32 kg, died, what is an average age of the remaining 8 persons.

### Choices

Choice (4)Response
a.50
b.52
c.56
d.54