IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 518  521 of 1022
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Question number: 518
Question
Divyang has certain amount in his account. He gives twoseventh of this to his daughter and twothird of the remaining to his 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: 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.  105 

b.  135 

c.  90 

d.  120 

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.  120 

b.  160 

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.  16: 15 

c.  15: 16 

d.  4: 5 
