IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 73  79 of 1022
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Question number: 73
Question
Simplify
Choices
Choice (4)  Response  

a.  89  
b.  90  
c.  87  
d.  88 
Question number: 74
Question
The difference of the sum of even numbers and sum of odd numbers between 10 and 20 is________.
Choices
Choice (4)  Response  

a.  13  
b.  14  
c.  15  
d.  16 
Question number: 75
Question
A rational number
Choices
Choice (4)  Response  

a.  It is not possible to represent on the number line  
b.  Lies to the left side of 0 on the number line  
c.  Lies to the right side of 0 on the number line  
d.  Cannot be determined on which side the number lies 
Question number: 76
Question
The product of two rational numbers is . If one of the numbers is , then the other number is________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 77
Question
What will be the sign of the product if we together multiply 101 negative integers and 11 positive integers?
Choices
Choice (4)  Response  

a.  Positive  
b.  Negative  
c.  Data is insufficient  
d.  Can’t say 
Question number: 78
Question
The difference of the sum of even numbers and sum of odd numbers between 20 and 30 is________.
Choices
Choice (4)  Response  

a.  24  
b.  13  
c.  26  
d.  25 
Question number: 79
Question
In each packet there are total 21 pencils, then how many pencils will there be in 5 packets?
Choices
Choice (4)  Response  

a.  300  
b.  100  
c.  105  
d.  30 