Number System (IMO Mathematics Olympiad (SOF) Class 7): Questions 76  81 of 81
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Question number: 76
» 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. 


b. 


c. 


d. 


Question number: 77
» Number System
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.  Can’t say 

b.  Data is insufficient 

c.  Positive 

d.  Negative 

Question number: 78
» Number System
Question
The difference of the sum of even numbers and sum of odd numbers between 20 and 30 is________.
Choices
Choice (4)  Response  

a.  13 

b.  26 

c.  24 

d.  25 

Question number: 79
» Number System
Question
In each packet there are total 21 pencils, then how many pencils will there be in 5 packets?
Choices
Choice (4)  Response  

a.  30 

b.  100 

c.  105 

d.  300 

Question number: 80
» Number System
Question
Which of the following number is not an integer number?
Choices
Choice (4)  Response  

a. 


b. 


c.  0 

d.  2 

Question number: 81
» Number System
Question
175  70 
The diagram above contains 13 boxes. The numbers in the second and the twelfth boxes are respec tively 175 and 70. Fill up the boxes with natural numbers such that
 Sum of all numbers in all the 13 boxes is 2015,
 Sum of the numbers in any three consecutive boxes is always the same.
The solution must contain the steps how you arrive at the numbers.
Choices
Choice (4)  Response  

a.  210 

b.  212 

c.  207 

d.  208 
