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