Direct and Inverse Proportions (IMO Mathematics Olympiad Class 8): Questions 48  53 of 62
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Question number: 48
» Direct and Inverse Proportions
Question
A bag contains 50 paise, 25 paise and 10 paise coins in the ratio 1: 2: 3. If their total value is Rs. 26, the number of 50 paise coins is ________.
Choices
Choice (4)  Response  

a.  80 

b.  20 

c.  30 

d.  50 

Question number: 49
» Direct and Inverse Proportions
Question
If , then the value of is________.
Choices
Choice (4)  Response  

a.  36 

b.  35 

c.  39 

d.  31 

Question number: 50
» Direct and Inverse Proportions
Question
A sum of money is sufficient to pay wages for 15 days and wages for 20 days. The same money is sufficient to pay the wages of both for ________.
Choices
Choice (4)  Response  

a.  10 days 

b.  days 

c.  days 

d.  8 days 

Question number: 51
» Direct and Inverse Proportions
Question
If 5 men take an hour to dig a ditch, how long should it take 20 men to dig a ditch of the same type?
Choices
Choice (4)  Response  

a.  14 min 

b.  13 min 

c.  15 min 

d.  21 min 

Question number: 52
» Direct and Inverse Proportions
Question
An agent receives a commission of Rs. 30.00 on sales of Rs. 2500.00. The commission he get on sales of Rs. 1000.00 is________.
Choices
Choice (4)  Response  

a.  Rs 2.5 

b.  Rs 1.2 

c.  Rs 2 

d.  Rs 3.5 

Question number: 53
» Direct and Inverse Proportions
Question
Pipes A and B can fill a tank in 3 and 4 hours respectively. Pipe C can empty it in 8 hours. If all the three pipes are opened together, then the tank will be filled in:
Choices
Choice (4)  Response  

a.  hours 

b.  hours 

c.  hours 

d.  hours 
