Mathematics (NTSE Stage1 (StateLevel) ScholasticAptitude & Language Comprehension): Questions 53  58 of 218
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Question number: 53
» Mathematics » Percentage
Question
A man buys 4 tables and 5 chairs for Rs. 1000. If he sells the tables at 10 % profit and chairs 20 % profit, he earns a profit of Rs. 120. What is the cost of one table?
Choices
Choice (4)  Response  

a.  Rs. 220  
b.  Rs. 200  
c.  Rs. 240  
d.  Rs. 260 
Question number: 54
» Mathematics » Probability
Question
What is the probability of getting at least one head when two coins are tossed simultaneously?
Choices
Choice (4)  Response  

a.  0.5
 
b.  0.66
 
c.  0.75
 
d.  0.25 
Question number: 55
» Mathematics » Trigonometry
Question
From the top of a pillar of height 20 m the angles of elevation and depression of the top and bottom of another pillar are 30° and 45°, respectively. The height of the second pillar (in m) is
Choices
Choice (4)  Response  

a.  20
 
b. 
 
c. 
 
d. 

Question number: 56
» Mathematics » Statistics
Question
If the geometric mean of three observations 40, 50 and x is 10, then the value of x is
Choices
Choice (4)  Response  

a.  4  
b.  2  
c.  0.5  
d.  6 
Question number: 57
» Mathematics » Rational Numbers
Question
If x and y denote respectively, the area and the sum of the length of diagonals of a rectangle with length 1 unit and breadth unit, then which one of the following is correct?
Choices
Choice (4)  Response  

a.  x is irrational and y is rational  
b.  x and y are both irrational  
c.  x is rational and y is irrational  
d.  x and y are rational 
Question number: 58
» Mathematics » Percentage
Question
3 L of water is added to 5 L of a 20 % solution of alcohol in the water. The strength of the alcohol is now
Choices
Choice (4)  Response  

a.  27.5%  
b.  12.5%  
c.  20%
 
d.  28.5% 