IMO Mathematics Olympiad Class 6: Questions 155  162 of 1049
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Question number: 155
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: 156
Question
Multiplying three negative integers with a positive integer gives a ________ result.
Choices
Choice (4)  Response  

a.  Negative 

b.  Positive 

c.  0 

d.  None of the above 

Question number: 157
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: 158
Question
Number of prime numbers from 1 to 50 are
Choices
Choice (4)  Response  

a.  12 

b.  18 

c.  15 

d.  20 

Question number: 159
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: 160
Question
is divisible by
Choices
Choice (4)  Response  

a.  2 

b.  3 

c.  9 

d.  10 

Question number: 161
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 

Question number: 162
Question
The LCM of two numbers is 138. If one of the numbers is 46 and another is 69, then the HCF is
Choices
Choice (4)  Response  

a.  23 

b.  13 

c.  28 

d.  29 
