IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 30  34 of 1022
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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. 

Question number: 33
Question
An insect crawls up 7 cm every second on an 80 cm vertical rod and then falls down 3 cm over the next second. How many seconds will it take to climb the rod?
Choices
Choice (4)  Response  

a.  30 seconds  
b.  20 seconds  
c.  60 seconds  
d.  39 seconds 
Question number: 34
Question
Which of the following statements is true?
Choices
Choice (4)  Response  

a.  The product of two rational numbers is a rational number  
b.  Zero has no reciprocal  
c.  1 and 1 are reciprocal of themselves  
d.  All a. , b. and c. are correct 