Number System (IMO Mathematics Olympiad Class 7): Questions 38  44 of 81
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Question number: 38
» Number System
Question
A gardener plans to plant 630 trees in 21 rows each containing the same number of trees, then how many trees will there be in each row?
Choices
Choice (4)  Response  

a.  3 

b.  21 

c.  30 

d.  300 

Question number: 39
» Number System
Question
The sign of the product of one positive integer and one negative integer is________.
Choices
Choice (4)  Response  

a.  Negative 

b.  Cannot be determined 

c.  Positive or Negative 

d.  Positive 

Question number: 40
» Number System
Question
What will be the sign of the product if we together multiply 200 negative integers and 12 positive integers?
Choices
Choice (4)  Response  

a.  Negative 

b.  Data is insufficient 

c.  Positive 

d.  Can’t say 

Question number: 41
» Number System
Question
What will be the sign of the product if we together multiply 199 negative integers and 10 positive integers?
Choices
Choice (4)  Response  

a.  Negative 

b.  Data is insufficient 

c.  Positive 

d.  Can’t say 

Question number: 42
» Number System
Question
The value of X in , is________.
Choices
Choice (4)  Response  

a. 


b. 


c.  3 

d.  2 

Question number: 43
» Number System
Question
The value of is________.
Choices
Choice (4)  Response  

a.  4 

b.  2 

c.  1 

d.  3 

Question number: 44
» Number System
Question
The difference of the sum of even numbers and sum of odd numbers between 1 and 10 is________.
Choices
Choice (4)  Response  

a.  3 

b.  5 

c.  4 

d.  6 
