IMO Level 1 Mathematics Olympiad (SOF) Class 9: Questions 780  785 of 929
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Question number: 780
Question
A milk vendor has 2 cans of milk. The first contains water and the rest milk. The second contains water. How much milk should he mix from each of the containers so as to get 20 liters of milk such that the ratio of water to milk is ?
Choices
Choice (4)  Response  

a.  14.71 liters, 5.29 liters  
b.  4.12 liters, 8.52 liters  
c.  5.12 liters, 17.52 liters  
d.  17 liters, 15 liters 
Question number: 781
Question
The simple interest on a sum of money at per annum for 6 years is half the sum. The sum is ________
Choices
Choice (4)  Response  

a.  Rs. 8000  
b.  Rs. 6000  
c.  Data inadequate  
d.  Rs. 4800 
Question number: 782
Question
Given that is a solution of . The other solutions are ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c.  5  
d. 

Question number: 783
Question
Cards marked with the numbers 2 to 101 are placed in a box and mixed thoroughly. One card is drawn from this bag. The probability that the number which is a perfect square is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 784
» Introduction to Euclid's Geometry
Question
If a point R lies between two points P and Q such that PR = QR, then PR = ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 785
Question
A shopkeeper earns a profit of on selling a book at discount on the printed price. The ratio of the cost price and the printed price of the book is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d.  Question does not provide sufficient data or is vague 