IMO Mathematics Olympiad Class 6: Questions 226  230 of 1049
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Question number: 226
Question
If a, b and c are whole numbers such that a > b and c 0 and c > 0, then
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  Question does not provide sufficient data or is vague 

Question number: 227
Question
A unit fraction is one of the from where ‘a’ is a natural number ( . Any proper fraction can be written as the sum of two or more unit fractions.
{Ex. }
In the case of , the factors of 2 are 1 and 2 only
Express as the sum of two different unit fraction in different ways.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 228
Question
Difference between the face value of 3 & 5 in 134, 890 and 215, 648 is
Choices
Choice (4)  Response  

a.  25, 000 

b.  8 

c.  2 

d.  29, 242 

Question number: 229
Question
The coprime numbers and also prime numbers from the following pairs, is
Choices
Choice (4)  Response  

a.  47 and 63 

b.  31 and 33 

c.  29 and 57 

d.  83 and 97 

Question number: 230
Question
The least number which when decreased by 7 is exactly divisible by 6, 7, 21 and 42 is
Choices
Choice (4)  Response  

a.  53 

b.  49 

c.  35 

d.  36 
