IMO Mathematics Olympiad (SOF) Class 8: Questions 528  535 of 1029
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Question number: 528
» Direct and Inverse Proportions
Question
A can do a work in 8 days. If B is 60 % more efficient than A, then in how many days can B do the same work?
Choices
Choice (4)  Response  

a.  3.5 

b.  3 

c.  5 

d.  4 

Question number: 529
Question
The value of is________.
Choices
Choice (4)  Response  

a. 


b.  49 

c. 


d. 


Question number: 530
Question
If and, then is equal to________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 531
» Direct and Inverse Proportions
Question
A man completes of a job in 10 days. At this rate how many more days will it take him to finish the job?
Choices
Choice (4)  Response  

a.  6 

b.  7.5 

c.  6.5 

d.  7 

Question number: 532
Question
The standard form of 0.00005 is________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 533
Question
Given that and, then the value of is (approximately) ________.
Choices
Choice (4)  Response  

a.  1.23 

b.  1.21 

c.  1.99 

d.  1.00 

Question number: 534
» 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: 535
» 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 
