IMO Mathematics Olympiad Class 7: Questions 530  534 of 1012
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Question number: 530
Question
There are three containers with liters, liters and liters of diesel. The greatest possible size of the measuring container with which we can measure the diesel of any container while every time the container must be completely filled is ________.
Choices
Choice (4)  Response  

a.  29 

b.  41 

c.  37 

d.  31 

Question number: 531
Question
Mohan has certain amount in his account. He gives half of this to his eldest son and one third of the remaining to his youngest son. The amount left with him now is ________.
Choices
Choice (4)  Response  

a.  of the original 

b.  of the original 

c.  of the original 

d.  of the original 

Question number: 532
Question
The total cost of 2 mirrors and 3 stools is Rs. 1525. If one stool costs Rs. 50 more than one mirror, find the price of each mirror and stool respectively.
Choices
Choice (4)  Response  

a.  Rs. 225, Rs. 375 

b.  Rs. 275, Rs. 325 

c.  Rs. 365, Rs. 215 

d.  Rs. 265, Rs. 355 

Question number: 533
Question
Each of two groups of tourists has 80 people. If of the first group and of the second group board trains to travel to a hill station, how many more people of the first group board trains than of the second group?
Choices
Choice (4)  Response  

a.  21 

b.  32 

c.  28 

d.  25 

Question number: 534
Question
Four bells toll at intervals of 28 seconds, 30 seconds, 36 seconds and 42 seconds respectively. They start ringing together at a particular time. They next toll together after ________.
Choices
Choice (4)  Response  

a.  15 minutes 

b.  26 minutes 

c.  19 minutes 

d.  21 minutes 
