IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 10  15 of 1022
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Question number: 10
Question
In a magic square each row, column and diagonal have the same sum, then the values of A and B are respectively________.
3  4  1 
2  A  2 
1  B  3 
Choices
Choice (4)  Response  

a. 


b.  4,0 

c.  1,1 

d. 


Question number: 11
Question
An insect crawls up 5 cm every second on a 60 cm vertical rod and then falls down 2 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.  60 seconds 

d.  20 seconds 

Question number: 12
Question
The average of the two middle rational numbers if are arranged in ascending order is________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 13
Question
The value of is ________.
Choices
Choice (4)  Response  

a.  144 

b. 


c.  240 

d.  0 

Question number: 14
Question
8 is a ________ number
Choices
Choice (4)  Response  

a.  Irrational 

b.  Prime 

c.  Rational 

d.  Question does not provide sufficient data or is vague 

Question number: 15
Question
In a magic square each row, column and diagonal have the same sum, then the values of A and B are respectively________.
6  1  4 
A  3  5 
2  7  B 
Choices
Choice (4)  Response  

a.  1,1 

b. 


c. 


d.  0,0 
