Mathematics [NSTSE (National Science Talent Search Exam Unified Council) Class 9]: Questions 466  471 of 989
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Question number: 466
Question
MCQ▾Which of the following alternatives is wrong? Given that
(I) Difference of two rational numbers is a rational number
(II) Subtraction is commutative on rational numbers
(III) Addition is not commutative on rational numbers
Choices
Choice (4)  Response  

a.  (I) and (III)  
b.  (I) only  
c.  (II) and (III)  
d.  Question does not provide sufficient data or is vague 
Question number: 467
Question
MCQ▾In a if , , then perimeter of the triangle is
Choices
Choice (4)  Response  

a.  73 cm  
b.  54 cm  
c.  61 cm  
d.  None of the above 
Question number: 468
Question
MCQ▾If a coin is tossed twice, the probability of getting at least one tail is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d.  Question does not provide sufficient data or is vague 
Question number: 469
Question
MCQ▾If is divided by 17 then the remainder is
Choices
Choice (4)  Response  

a.  2  
b.  1  
c.  0  
d.  1 
Question number: 470
Question
MCQ▾The area of a triangle whose sides are 12,13 and 15 cm.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 471
Question
MCQ▾A cylindrical vessel of diameter 12 cm is partly filled with water. 120 lead balls are dropped in it. The raise in water level is 0.8 cm. The diameter of each ball is ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
