IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 546  551 of 1012
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Question number: 546
Question
A school has 4500 students. The ratio of girls to boys 5: 4. How many girls are there in the class?
Choices
Choice (4)  Response  

a.  2100 

b.  2000 

c.  2500 

d.  2400 

Question number: 547
Question
Equal sums of Rs. 5500 were lent to Neha and Suman at 10 % per annum for a period of 2 years and 3 years respectively. Find the difference of the interest paid by Neha and Suman.
Choices
Choice (4)  Response  

a.  Rs. 150 

b.  Rs. 550 

c.  Rs. 280 

d.  Rs. 350 

Question number: 548
Question
There are three drums with 1653 liters, 2261 liters and 2527 liters of petrol. The greatest possible size of the measuring vessel with which we can measure the petrol of any drum while every time the vessel must be completely filled is ________.
Choices
Choice (4)  Response  

a.  41 

b.  19 

c.  31 

d.  27 

Question number: 549
Question
An organization sent out 420 invitations for a fundraiser function. Of the people invited, 315 attended. What percent of the people invited attended the fundraiser?
Choices
Choice (4)  Response  

a.  33% 

b.  25% 

c.  43% 

d.  75% 

Question number: 550
Question
There are 6 stones in a box with numbers 1 to 6 marked on them. What is the probability of drawing a stone with number 6?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  1 

Question number: 551
Question
The total cost of 5 books and 3 bags is Rs. 2500. If one book costs Rs. 25 less than one bag, find the price of each book and bag respectively.
Choices
Choice (4)  Response  

a.  Rs. 300, Rs. 320 

b.  Rs. 320, Rs. 380 

c.  Rs. 330, Rs. 308 

d.  Rs. 303, Rs. 328 
