Playing with Numbers [IMO Level 1 Mathematics Olympiad (SOF) Class 6]: Questions 9  17 of 86
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Question number: 9
» Playing with Numbers
Question
The two numbers nearest to 2000 which are exactly divisible by each of 2,3, 4,5 and 6 is
Choices
Choice (4)  Response  

a.  1860,2220  
b.  1969,2220  
c.  1940,2220  
d.  1970,2220 
Question number: 10
» Playing with Numbers
Question
Which of the following is not a perfect cube?
Choices
Choice (4)  Response  

a.  216  
b.  512  
c.  342  
d.  27 
Question number: 11
» Playing with Numbers
Question
The numbers which are multiplies of 2 are called________.
Choices
Choice (4)  Response  

a.  Odd  
b.  Composite  
c.  Prime  
d.  Even 
Question number: 12
» Playing with Numbers
Question
The smallest value of ‘x’ in the number 156 × 0 so that it is divisible by10 is:
Choices
Choice (4)  Response  

a.  2  
b.  1  
c.  0  
d.  All a. , b. and c. are correct 
Question number: 13
» Playing with Numbers
Question
is divisible by
Choices
Choice (4)  Response  

a.  7  
b.  9  
c.  11  
d.  3 
Question number: 14
» Playing with Numbers
Question
The least number which when increased by 6 is exactly divisible by 12,24 and 48 is
Choices
Choice (4)  Response  

a.  23  
b.  54  
c.  36  
d.  42 
Question number: 15
» Playing with Numbers
Question
The reciprocal of the smallest prime is
Choices
Choice (4)  Response  

a.  0  
b.  2  
c.  1  
d. 

Question number: 16
» Playing with Numbers
Question
Which of the following is a perfect square?
Choices
Choice (4)  Response  

a.  49  
b.  68  
c.  56  
d.  48 
Question number: 17
» Playing with Numbers
Question
Which of the following is the pair of twin primes?
Choices
Choice (4)  Response  

a.  (5,11)  
b.  (7,11)  
c.  (17,19)  
d.  (19,23) 