IMO Mathematics Olympiad Class 6: Questions 178  184 of 912
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Question number: 178
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: 179
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: 180
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: 181
Question
693 is divisible by
Choices
Choice (4)  Response  

a.  6  
b.  9  
c.  3 & 9  
d.  3 
Question number: 182
Question
Rohan’s monthly salary is Rs. 18000. He spends Rs. 2050 for his home expenses, Rs. 1590 for purchasing clothes, Rs. 870 for purchasing groceries, milk, etc. , Rs. 1900 for purchasing medicine and pays a rent of Rs. 4500 in a particular month. How much does he save in this month?
Choices
Choice (4)  Response  

a.  Rs. 7090  
b.  Rs. 8609  
c.  Rs. 7050  
d.  Rs. 6870 
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 