Number System (IMO Mathematics Olympiad Class 7): Questions 32  37 of 81
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Question number: 32
» Number System
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
» Number System
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.  39 seconds 

b.  30 seconds 

c.  20 seconds 

d.  60 seconds 

Question number: 34
» Number System
Question
Which of the following statements is true?
Choices
Choice (4)  Response  

a.  Zero has no reciprocal 

b.  1 and 1 are reciprocal of themselves 

c.  The product of two rational numbers is a rational number 

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

Question number: 35
» Number System
Question
The product of two rational numbers is. If one of the numbers is , then the other number is________.
Choices
Choice (4)  Response  

a.  27 

b.  36 

c.  22 

d.  49 

Question number: 36
» Number System
Question
The value of y such that and are equivalent rational numbers is________.
Choices
Choice (4)  Response  

a. 


b. 


c.  15 

d.  5 

Question number: 37
» Number System
Question
Simplify
Choices
Choice (4)  Response  

a. 


b.  7 

c. 


d.  8 
