IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 545  549 of 1022
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Question number: 545
Question
Rohan has certain amount in his account. He gives twothird of this to his mother and one third of the remaining to his daughter. 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: 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.  2000 

b.  2100 

c.  2400 

d.  2500 

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. 350 

c.  Rs. 280 

d.  Rs. 550 

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.  19 

b.  27 

c.  41 

d.  31 

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.  25% 

b.  75% 

c.  43% 

d.  33% 
