IMO Level 1 Mathematics Olympiad (SOF) Class 8: Questions 546  553 of 1040
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Question number: 546
Question
The solution of , is________.
Choices
Choice (4)  Response  

a.  2  
b.  1  
c.  3  
d.  4 
Question number: 547
» Direct and Inverse Proportions
Question
can do a piece of work in 70 days. He works at it for 7 days and then alone finishes the work in 40 days. The two together could have completed the work in ________.
Choices
Choice (4)  Response  

a.  20.5 days  
b.  23 days  
c.  30 days  
d.  23.8 days 
Question number: 548
Question
The value of , is________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 549
» Direct and Inverse Proportions
Question
Two pipes A and B can fill a tank in 12 and 24 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?
Choices
Choice (4)  Response  

a.  5 minutes  
b.  6 minutes  
c.  2 minutes  
d.  8 minutes 
Question number: 550
Question
Which of the following values are equal?
(1) (2) (3) (4)
Choices
Choice (4)  Response  

a.  1 and 4  
b.  2 and 3  
c.  1 and 3  
d.  1 and 2 
Question number: 551
Question
Simplify:
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d.  1 
Question number: 552
Question
Given that and , then the value of is (approximately) ________.
Choices
Choice (4)  Response  

a.  4.39  
b.  4.00  
c.  4.57  
d.  4.21 
Question number: 553
» Direct and Inverse Proportions
Question
An agent receives a commission of Rs. 50.00 on sales of Rs. 3500.00. The commission he get on sales of Rs. 300.00 is________.
Choices
Choice (4)  Response  

a.  Rs 4.00  
b.  Rs 4.28  
c.  Rs 2.87  
d.  Rs 3.50 