IMO Level 1 Mathematics Olympiad (SOF) Class 6: Questions 216  222 of 1059
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Question number: 216
Question
The LCM of two numbers is 198. If one number is 396 and another is 66, then the HCF is
Choices
Choice (4)  Response  

a.  132 

b.  144 

c.  231 

d.  154 

Question number: 217
Question
The integer which is 7 more than is
Choices
Choice (4)  Response  

a.  4 

b.   4 

c.   10 

d.  16 

Question number: 218
Question
There are 216 black balls in a basket. A boy takes out 8 black balls from it and replaces them by 16 white balls. He continues to do so, till all black balls are replaced by white balls. Find the number of white balls put in the basket?
Choices
Choice (4)  Response  

a.  462 

b.  654 

c.  432 

d.  485 

Question number: 219
Question
Number of prime and coprime numbers from 30 to 90 are
Choices
Choice (4)  Response  

a.  14 

b.  15 

c.  13 

d.  19 

Question number: 220
Question
Two tankers contain 850 liters and 680 liters of kerosene oil respectively, then the maximum capacity of a container which can measure the kerosene out of both the tankers when used an exact number of times is ________.
Choices
Choice (4)  Response  

a.  34 liters 

b.  85 liters 

c.  170 liters 

d.  10 liters 

Question number: 221
Question
The two numbers smaller than 4000 which are exactly divisible by each of 2,3, 4,5, 6 and 8 is
Choices
Choice (4)  Response  

a.  3920,4140 

b.  2720,4320 

c.  3720,2880 

d.  4020,3810 

Question number: 222
Question
If a, b and c are whole numbers such that b > a and c 0 and c > 3, then
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  Question does not provide sufficient data or is vague 
