Playing With Numbers (IMO Mathematics Olympiad Class 6): Questions 34  42 of 86
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Question number: 34
» Playing With Numbers
Question
The smallest number which when divided by 4, 16, 32 and 40 and leaves a remainder of 3, 15, 31 and 39 respectively is
Choices
Choice (4)  Response  

a.  161 

b.  159 

c.  147 

d.  239 

Question number: 35
» Playing With Numbers
Question
HCF of two coprime numbers is
Choices
Choice (4)  Response  

a.  0 

b.  1 

c.  2 

d.  None of the above 

Question number: 36
» Playing With Numbers
Question
When a number is divided by seven, it has a remainder of 2. When it is divided by six, it has remainder of 3. What is the number?
Choices
Choice (4)  Response  

a.  16 

b.  44 

c.  38 

d.  9 

Question number: 37
» Playing With Numbers
Question
The coprime numbers from the following pairs, is
Choices
Choice (4)  Response  

a.  7 and 63 

b.  63 and 81 

c.  35 and 21 

d.  36 and 25 

Question number: 38
» Playing With Numbers
Question
The smallest value of ‘a’ in the number 321a8 so that it is divisible by 8 is:
Choices
Choice (4)  Response  

a.  1 

b.  2 

c.  4 

d.  3 

Question number: 39
» Playing With Numbers
Question
693 is divisible by
Choices
Choice (4)  Response  

a.  6 

b.  9 

c.  3 & 9 

d.  3 

Question number: 40
» Playing With Numbers
Question
Prime factorization of 13915 is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 41
» Playing With Numbers
Question
Number of prime and coprime numbers from 80 to 100 are
Choices
Choice (4)  Response  

a.  7 

b.  3 

c.  4 

d.  5 

Question number: 42
» Playing With Numbers
Question
Observe the following patterns. Then find the sum of .
………………………………………………………. ……………………………………………………….
Choices
Choice (4)  Response  

a.  150 

b.  320 

c.  180 

d.  200 
