IMO Mathematics Olympiad Class 8: Questions 584  591 of 1029
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Question number: 584
» 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: 585
» 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: 586
Question
The value of is________.
Choices
Choice (4)  Response  

a.  675 

b.  690 

c.  630 

d.  655 

Question number: 587
» 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: 588
Question
If, then the value of is________.
Choices
Choice (4)  Response  

a.  3 

b.  2 

c.  1 

d.  4 

Question number: 589
» 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: 590
Question
Simplify:
Choices
Choice (4)  Response  

a.  0 

b.  1 

c. 


d. 


Question number: 591
» 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 
