NSTSE (National Science Talent Search Exam Unified Council) Class 10: Questions 660  666 of 1484
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Question number: 660
Question
Two numbers are chosen from 2 to 8. The probability for the two numbers to be consecutive is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d.  None of the above 
Question number: 661
» Mathematics » Quadratic Equations
Question
If and are the roots of the quadratic equation with the condition , then the value of ‘m’ is
Choices
Choice (4)  Response  

a.   9  
b.  2  
c.  9  
d.  9 or 9 
Question number: 662
Question
A card is drawn from a packet of 150 cards numbered 1 to 150. The probability of drawing a number which is a square is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 663
Question
The value of = ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 664
Question
A person walking 30 m towards a chimney in a horizontal line through its base observes that its angle of elevation changes from to . The height of chimney is ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d.  None of the above 
Question number: 665
Question
The probability for a randomly selected number out of 51,52,53,54, …. , 80 to be a prime number is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 666
Question
From a normal pack of cards, a card is drawn at random. The probability of getting a jack or a king is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d.  All of the above 