IMO Level 1 Mathematics Olympiad (SOF) Class 10: Questions 501  505 of 968
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Question number: 501
» Triangle, Circle & Constructions
Question
In the adjacent figure, QP and QR are produced to meet RS and PS produced in T and U. then is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 502
Question
The mean of 10 observations is. By error, one observation was noted as was misread as 24. Then the correct mean is ________
Choices
Choice (4)  Response  

a.  23 

b.  21 

c.  25 

d.  27 

Question number: 503
Question
The distance between the points and is ________
Choices
Choice (4)  Response  

a.  2a 

b.  3a 

c.  a 

d.  5a 

Question number: 504
Question
A drawer contains 8 red socks, 12 white socks and 10 blue socks. Without looking you draw out a sock and then draw out a second sock without returning the first sock. What is the probability that the first sock and second sock are both white?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 505
Question
If 2 man or 3 women or 4 boys can do a piece of work in 60 days, then the same piece of work will be done by 1 man, 1 woman and 1 boy in ________
Choices
Choice (4)  Response  

a.  50 days 

b.  49 days 

c.  52 days 

d.  51 days 
