IMO Level 1 Mathematics Olympiad (SOF) Class 5: Questions 87  92 of 838
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Question number: 87
Question
which of the following is true?
Choices
Choice (4)  Response  

a. 


b. 


c.  Both a. and b. are correct 

d.  None of the above 

Question number: 88
Question
LXXXI – LXXX = ________.
Choices
Choice (4)  Response  

a.  1 

b.  0 

c.  10 

d.  All of the above 

Question number: 89
Question
Given that 70 is the 2^{nd} common multiple of 5 and
. Find the smallest possible number for
Choices
Choice (4)  Response  

a.  5 

b.  9 

c.  3 

d.  7 

Question number: 90
Question
Multiply the 3^{rd} multiple of by the 9^{th} multiple of 4. The answer is________.
Choices
Choice (4)  Response  

a.  2 

b.  27 

c.  3 

d.  4 

Question number: 91
Question
Given that 18 is common multiple of
and 3. Find the greatest possible number for
Choices
Choice (4)  Response  

a.  2 

b.  10 

c.  6 

d.  9 

Question number: 92
Question
Given that 10 is common multiple of
and 2. Find the greatest possible number for
Choices
Choice (4)  Response  

a.  9 

b.  2 

c.  5 

d.  10 
