IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 17  22 of 1022
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Question number: 17
Question
Which of the following number is not prime?
Choices
Choice (4)  Response  

a.  3  
b.  4  
c.  2  
d.  5 
Question number: 18
Question
A tank contains 1000 liters of water. Due to a small hole in the tank, the quantity of water is decreasing at the rate of 10 liters every hour. What will be the quantity of the water in the tank after 20 hours?
Choices
Choice (4)  Response  

a.  210 liters  
b.  900 liters  
c.  800 liters  
d.  490 liters 
Question number: 19
Question
If P: When two negative integers are added we always get a negative integer.
q: When two positive integers are added, we get a positive integer, then
Choices
Choice (4)  Response  

a.  P and q are false  
b.  P and q are true  
c.  P is true and q is false  
d.  P is false and q is true 
Question number: 20
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: 21
Question
The value of is ________.
Choices
Choice (4)  Response  

a.  144  
b. 
 
c.  0  
d.  240 
Question number: 22
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. 
