Mathematics [NSTSE (National Science Talent Search Exam Unified Council) Class 8]: Questions 74  80 of 1201
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Question 74
Question
MCQ▾A boat goes downstream and covers the distance between two parts in 6 hrs while it covers the same distance upstream in 7 hrs. If the speed of the stream is 3 kmph, the speed of the boat in still water is:
Choices
Choice (4)  Response  

a.  20 kmph  
b.  26 kmph  
c.  18 kmph  
d.  32 kmph 
Question 75
Question
MCQ▾The average of the middle two rational numbers if are arranged in ascending order is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question 76
Question
MCQ▾If , then ________.
Choices
Choice (4)  Response  

a.  20  
b.  20  
c.  20  
d.  All of the above 
Question 77
Question
MCQ▾In a square PQRS, the diagonals bisect at “O”. Then triangle POQ is:
Choices
Choice (4)  Response  

a.  An isosceles right angled triangle  
b.  An isosceles but not a right angled triangle  
c.  A right angle but not an isosceles triangle  
d.  An equilateral triangle 
Question 78
Question
MCQ▾The value of x for which open sentence is true.
Choices
Choice (4)  Response  

a.  3  
b.  2  
c.  5  
d.  1 
Question 79
Question
MCQ▾If , then ________.
Choices
Choice (4)  Response  

a.  49  
b.  49  
c.  49  
d.  Question does not provide sufficient data or is vague 
Question 80
Question
MCQ▾The perimeter of a parallelogram is 60 cm. One side exceeds another by 2 cm. The sides of the parallelogram are:
Choices
Choice (4)  Response  

a.  54 cm, 56 cm  
b.  14 cm, 16 cm  
c.  16 cm, 18 cm  
d.  22 cm, 24 cm 