Everyday Mathematics (IMO Mathematics Olympiad Class 10): Questions 53  57 of 67
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Question number: 53
» Everyday Mathematics
Question
Two Friends P and Q appeared for an exam. Let A be the event that P is selected and B is the event that Q is selected. The probability of A is and that of B is . Find the probability that both of them are selected.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 54
» Everyday Mathematics
Question
Sanju has 64 small cubes of . He wants to arrange all of them in a cuboidal shape, such that the surface area will be minimum. What is the diagonal of this larger cuboid?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 55
» Everyday Mathematics
Question
The ratio between the ages of Samrat and Armaan at present is . Five years hence the ratio of their ages will be . What is the present age of Samrat?
Choices
Choice (4)  Response  

a.  25 years 

b.  Data inadequate 

c.  15 years 

d.  10 years 

Question number: 56
» Everyday Mathematics
Question
A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and C in 198 seconds, all starting at the same point. After what time will they meet again at the starting point?
Choices
Choice (4)  Response  

a.  26 minutes 18 seconds 

b.  42 minutes 36 seconds 

c.  46 minutes 12 seconds 

d.  45 minutes 

Question number: 57
» Everyday Mathematics
Question
P, Q and R start at the same time in the same direction to run around a circular stadium. P completes a round in 200 seconds, Q in 100 seconds and R in 300 seconds, all starting at the same point. After what time will they meet again at the starting point?
Choices
Choice (4)  Response  

a.  30 minutes 

b.  10 minutes 

c.  16 minutes 

d.  20 minutes 
