IMO Mathematics Olympiad (SOF) Class 7: Questions 519  523 of 1012
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Question number: 519
Question
In a Jungle, there are 15 lions in a cage. Then as shown in below chart, how many lions are in 7 cages.
Cage  1  3  5  7 
Lions  15  45  75   
What is the missing value in the chart?
Choices
Choice (4)  Response  

a.  90 

b.  120 

c.  135 

d.  105 

Question number: 520
Question
A shopkeeper priced 1 dozen bananas for 20 Rs. Below chart show price of 1 dozen to 4 dozen bananas.
Banana  1  2  3  4  5 
Price ( Rs. )  20  40  60  80   
What is the missing price in the chart for 5 dozen bananas?
Choices
Choice (4)  Response  

a.  160 

b.  120 

c.  90 

d.  100 

Question number: 521
Question
Two equal containers are filled with a mixture of milk and water. The concentration of milk in each of the containers is 20 % and 25 % respectively. What is ratio of water in both the containers respectively?
Choices
Choice (4)  Response  

a.  5: 4 

b.  4: 5 

c.  16: 15 

d.  15: 16 

Question number: 522
Question
There is 25 liters oil in red container and 35 more liters oil in black container. What is the ratio of oil in black container to the total liters of oil in both containers?
Choices
Choice (4)  Response  

a.  19: 14 

b.  9: 14 

c.  15: 9 

d.  14: 19 

Question number: 523
Question
The cost price of a pair of sandal is Rs. 3600 and the profit percent is . Find the selling price of the watch.
Choices
Choice (4)  Response  

a.  Rs. 4450 

b.  Rs. 3420 

c.  Rs. 4510 

d.  Rs. 5200 
