Playing With Numbers (IMO Mathematics Olympiad Class 6): Questions 18  25 of 86
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Question number: 18
» Playing With Numbers
Question
The HCF of two numbers is 54. If one number is 27 and another is 162, then the LCM is
Choices
Choice (4)  Response  

a.  31 

b.  85 

c.  51 

d.  81 

Question number: 19
» Playing With Numbers
Question
Prime factorization of 5775 is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 20
» Playing With Numbers
Question
The numbers which have only two factors (1 and the number itself) are called as
Choices
Choice (4)  Response  

a.  Prime 

b.  Composite 

c.  Even 

d.  All of the above 

Question number: 21
» Playing With Numbers
Question
There are 153 apples and 119 oranges. These fruits are to be arranged in heaps containing the same number of fruits. Then the greatest number of fruits possible in each heap is
Choices
Choice (4)  Response  

a.  20 

b.  15 

c.  23 

d.  17 

Question number: 22
» Playing With Numbers
Question
Number of prime numbers from 1 to 50 are
Choices
Choice (4)  Response  

a.  12 

b.  18 

c.  15 

d.  20 

Question number: 23
» Playing With Numbers
Question
The HCF and LCM of two numbers is 16 and 192 respectively. If one of the numbers is 64, the other one is
Choices
Choice (4)  Response  

a.  45 

b.  24 

c.  72 

d.  48 

Question number: 24
» Playing With Numbers
Question
is divisible by
Choices
Choice (4)  Response  

a.  2 

b.  3 

c.  9 

d.  10 

Question number: 25
» Playing With Numbers
Question
The HCF two numbers is 18. If one of the numbers is 90 and another is 36, then their LCM is
Choices
Choice (4)  Response  

a.  180 

b.  165 

c.  170 

d.  155 
