NSTSE (National Science Talent Search Exam Unified Council) Class 8: Questions 70  73 of 2028
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Question number: 70
» Mathematics » Linear Equations in One Variable
Question
The twice the son’s age in years is added to the father’s age, the sum is 50. But if twice the father’s age is added to the son’s age, the sum is 85. Then the ages of father and son respectively are:
Choices
Choice (4)  Response  

a.  45 yrs, 10 yrs 

b.  30 yrs, 15 yrs 

c.  40 yrs, 5 yrs 

d.  25 yrs, 10 yrs 

Question number: 71
» Mathematics » Linear Equations in One Variable
Question
How much pure alcohol should be added to 300 ml of strength 20 % to make its strength 45%?
Choices
Choice (4)  Response  

a.  198 ml 

b.  154 ml 

c.  167.36 ml 

d.  136.36 ml 

Question number: 72
» Mathematics » Rational Numbers
Question
Express as rational number.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 73
» Mathematics » Understanding Quadrilaterals
Question
PQ and RS are diameters. Then PRQS is:
Choices
Choice (4)  Response  

a.  Isosceles trapezium 

b.  Rectangle 

c.  Trapezium 

d.  Square 
