NSTSE (National Science Talent Search Exam Unified Council) Class 10: Questions 444  451 of 1484
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Question number: 444
Question
The values of ‘k’ for which the equation will have real and equal roots are
Choices
Choice (4)  Response  

a.  21 and 15  
b.  21 and 15  
c.  3 and 27  
d.  3 and 27 
Question number: 445
Question
If and then = ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d.  All of the above 
Question number: 446
Question
The reciprocal of is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 447
» Mathematics » Quadratic Equations
Question
In the equation the roots are equal when
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 448
» Mathematics » Quadratic Equations
Question
In the equation , the sum of the roots is 4 and the product of the roots is 12. Then h and k have the value ________ respectively.
Choices
Choice (4)  Response  

a.  4 and 6  
b.  2 and 3  
c.  8 and 6  
d.  4 and 12 
Question number: 449
» Mathematics » Surface Area and Volumes
Question
A cylindrical vessel of diameter 18 cm has some water in it. A cylindrical iron piece of diameter 12 cm and height 9 cm is dropped in it. After it was completely immersed, the raise in the level of water is ________.
Choices
Choice (4)  Response  

a.  1 cm  
b.  8 cm  
c.  4 cm  
d.  2 cm 
Question number: 450
Question
= ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d.  None of the above 
Question number: 451
» Mathematics » Quadratic Equations
Question
If p and q are the rots of , then = ________.
Choices
Choice (4)  Response  

a.   11  
b.   12  
c.  13  
d.  37 