IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 67  71 of 1022
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Question number: 67
Question
A fraction can be expressed as a terminating decimal if y has no prime factors other than ________.
Choices
Choice (4)  Response  

a.  3,5 

b.  2,3 

c.  2,3, 5 

d.  2,5 

Question number: 68
Question
A rational number
Choices
Choice (4)  Response  

a.  Lies to the left side of 0 on the number line 

b.  Cannot be determined on which side the number lies 

c.  Lies to the right side of 0 on the number line 

d.  It is not possible to represent on the number line 

Question number: 69
Question
Which of the following statements is correct?
Choices
Choice (4)  Response  

a.  All integers are whole numbers, all natural numbers are integers 

b.  All whole numbers are integers, all integers are natural numbers 

c.  All integers are whole numbers, all integers are natural numbers 

d.  All natural numbers are whole numbers, all whole numbers are integers 

Question number: 70
Question
Assertion (Ꭺ)
Rational numbers are always closed under division by only nonzero rational numbers
Reason (Ꭱ)
Division by zero is not defined for any rational numbers
Choices
Choice (4)  Response  

a.  Ꭺ is true but Ꭱ is false 

b.  Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ 

c.  Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ 

d.  Both Ꭺ and Ꭱ are false 

Question number: 71
Question
Which of the following statement is true?
Choices
Choice (4)  Response  

a.  The product of a positive and a negative integer is negative 

b.  The product of a negative and a positive integer may be zero 

c.  For all nonzero integers a and b, is always greater than either a or b 

d.  Question does not provide sufficient data or is vague 
