IMO Mathematics Olympiad Class 6: Questions 178  184 of 1049
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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 
