IMO Level 1 Mathematics Olympiad (SOF) Class 8: Questions 515  520 of 1040
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Question number: 515
Question
Number of prime factors in is
Choices
Choice (4)  Response  

a.  72  
b.  70  
c.  55  
d.  73 
Question number: 516
Question
Match the following provided that and are any rational numbers different from zero and , are any rational numbers.
ListⅠ (Uses of Exponent Rules)  ListⅡ (Term with Different Base and Same Exponent) 

(A)
 (i)

(B)
 (ii)

(C)
 (iii)

Choices
Choice (4)  Response  

 
a. 
 
b. 
 
c. 
 
d.  All of the above 
Question number: 517
Question
The value of is________.
Choices
Choice (4)  Response  

a.  7  
b. 
 
c.  1  
d.  9 
Question number: 518
» Direct and Inverse Proportions
Question
For a group of 20 students food lasts for 55 days. For how many days will the same food last for 50 students?
Choices
Choice (4)  Response  

a.  21 days  
b.  12 days  
c.  22 days  
d.  11 days 
Question number: 519
Question
Match the following provided that and are any rational numbers different from zero and , are any rational numbers.
ListⅠ (Terms with Same Base Different Exponents)  ListⅡ (Uses of Basic Exponent Rule) 

(A)
 (i)

(B)
 (ii)

(C)
 (iii)

Choices
Choice (4)  Response  

 
a. 
 
b. 
 
c. 
 
d.  All of the above 
Question number: 520
» Direct and Inverse Proportions
Question
can do a piece of work in 60 days. He works at it for 10 days and then alone finishes the work in 42 days. The two together could have completed the work in ________.
Choices
Choice (4)  Response  

a.  22 days  
b.  30 days  
c.  20 days  
d.  25 days 