Playing With Numbers (IMO Mathematics Olympiad (SOF) Class 6): Questions 58  64 of 86
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Question number: 58
» Playing With Numbers
Question
The LCM of two numbers is 198. If one number is 396 and another is 66, then the HCF is
Choices
Choice (4)  Response  

a.  231 

b.  132 

c.  144 

d.  154 

Question number: 59
» Playing With Numbers
Question
Number of prime and coprime numbers from 30 to 90 are
Choices
Choice (4)  Response  

a.  14 

b.  13 

c.  15 

d.  19 

Question number: 60
» Playing With Numbers
Question
Two tankers contain 850 liters and 680 liters of kerosene oil respectively, then the maximum capacity of a container which can measure the kerosene out of both the tankers when used an exact number of times is ________.
Choices
Choice (4)  Response  

a.  85 liters 

b.  10 liters 

c.  170 liters 

d.  34 liters 

Question number: 61
» Playing With Numbers
Question
The two numbers smaller than 4000 which are exactly divisible by each of 2,3, 4,5, 6 and 8 is
Choices
Choice (4)  Response  

a.  4020,3810 

b.  3920,4140 

c.  3720,2880 

d.  2720,4320 

Question number: 62
» Playing With Numbers
Question
The two numbers nearest to 10000 which are exactly divisible by each of 2,3, 4,5, 6 and 7 is
Choices
Choice (4)  Response  

a.  9669,10080 

b.  10340,10080 

c.  9320,10080 

d.  9660,10080 

Question number: 63
» Playing With Numbers
Question
The two consecutive prime numbers with difference 2 are called ________.
Choices
Choice (4)  Response  

a.  Composite 

b.  Coprimes 

c.  Twin primes 

d.  Even 

Question number: 64
» Playing With Numbers
Question
The coprime numbers and also prime numbers from the following pairs, is
Choices
Choice (4)  Response  

a.  47 and 63 

b.  31 and 33 

c.  29 and 57 

d.  83 and 97 
