IMO Mathematics Olympiad (SOF) Class 6: Questions 183  189 of 1049
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Question number: 183
Question
Prime factorization of 13915 is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 184
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: 185
Question
Product of two integer is If one of the integers is , then the other is
Choices
Choice (4)  Response  

a.  19 

b.  1 

c.  0 

d.  9 

Question number: 186
Question
Observe the following patterns. Then find the sum of .
………………………………………………………. ……………………………………………………….
Choices
Choice (4)  Response  

a.  150 

b.  320 

c.  180 

d.  200 

Question number: 187
Question
The expression is equivalent to, uses the ________ property.
Choices
Choice (4)  Response  

a.  Associative 

b.  Closure 

c.  Identity 

d.  Commutative 

Question number: 188
Question
Multiply the unit’s place of the number obtained by reversing the digits of the number 78923 with the hundred’s place of the number obtained by interchanging the digits in the unit’s place and the thousand’s place of the same number, we get________.
Choices
Choice (4)  Response  

a.  54 

b.  64 

c.  16 

d.  63 

Question number: 189
Question
A number is always divisible by 60 if
Choices
Choice (4)  Response  

a.  It is divisible by both 6 and 10 

b.  It is divisible by both 2 and 30 

c.  It is divisible by both 4 and 15 

d.  All a. , b. and c. are correct 
