IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 28  32 of 1022
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Question number: 28
Question
A tank contains 500 liters of water. Due to a small hole in the tank, the quantity of water is decreasing at the rate of 9 liters every hour. What will be the quantity of the water in the tank after 10 hours?
Choices
Choice (4)  Response  

a.  491 liters 

b.  400 liters 

c.  410 liters 

d.  90 liters 

Question number: 29
Question
For any two rational numbers x and y which of the following are correct, if x is positive and y is negative?
1. X < Y 2. X = Y 3. X > Y
Choices
Choice (4)  Response  

a.  Only 1 and 2 are correct 

b.  Only 3 is correct 

c.  Only 2 and 3 are correct 

d.  Question does not provide sufficient data or is vague 

Question number: 30
Question
Which of the following statements is true?
Choices
Choice (4)  Response  

a.  is a rational number 

b.  Irrational number is not written in ration form 

c.  2 is a prime number 

d.  All a. , b. and c. are correct 

Question number: 31
Question
Which of the following number sentence below best describes the problem shown on the number line?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 32
Question
In a magic square each row, column and diagonal have the same sum, then the values of A and B are respectively________.
1  10  0 
A  3  2 
6  4  B 
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

