Direct and Inverse Proportions (IMO Mathematics Olympiad (SOF) Class 8): Questions 21  27 of 62
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Question number: 21
» Direct and Inverse Proportions
Question
A grocer has just enough money to buy 50 kilo rice worth Rs. 70.00 per kilogram. If cost of the rice is Rs. 10.00 more, then how much rice, he will be able to buy with that amount of money, is________.
Choices
Choice (4)  Response  

a.  40 Kg 

b.  42 Kg 

c.  44 Kg 

d.  35 Kg 

Question number: 22
» Direct and Inverse Proportions
Question
Pipe A can fill an empty tank in 4 hours while pipe B can empty the full tank in 3 hours. If both are opened in the empty tank, time taken to empty it up completely is ________.
Choices
Choice (4)  Response  

a.  11 hours 

b.  13 hours 

c.  15 hours 

d.  12 hours 

Question number: 23
» Direct and Inverse Proportions
Question
The weight of a 11 m long iron rod is 15 kg. The weight of 5 m long of such rod will be________.
Choices
Choice (4)  Response  

a.  8.5 kg 

b.  6.5 kg 

c.  6.8 kg 

d.  8 kg 

Question number: 24
» Direct and Inverse Proportions
Question
The ratio of boys and girls in a school of 650 students is. How many boys should be admitted to make ratio?
Choices
Choice (4)  Response  

a.  140 

b.  130 

c.  150 

d.  120 

Question number: 25
» Direct and Inverse Proportions
Question
The ratio which bears to is________.
Choices
Choice (4)  Response  

a.  1.50 

b.  1.65 

c.  1.68 

d.  1.78 

Question number: 26
» Direct and Inverse Proportions
Question
If and, then the value of is ________.
Choices
Choice (4)  Response  

a.  10 

b.  6 

c.  8 

d.  9 

Question number: 27
» Direct and Inverse Proportions
Question
A sum of money is sufficient to pay wages for 25 days and wages for 25 days. The same money is sufficient to pay the wages of both for ________.
Choices
Choice (4)  Response  

a.  11 days 

b.  days 

c.  10 days 

d.  12 days 
