NSTSE (National Science Talent Search Exam Unified Council) Class 10: Questions 249  255 of 1484
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Question number: 249
» Mathematics » Arithmetic Progressions
Question
If ‘a’ is the AM of 3 numbers and ‘b’ is the AM of their squares, then the AM of their pair wise products in terms of a and b is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  All of the above 

Question number: 250
» Mathematics » Arithmetic Progressions
Question
The sum of the first 50 positive integers exactly divisible by 7 is
Choices
Choice (4)  Response  

a.  7140 

b.  8925 

c.  8980 

d.  7535 

Question number: 251
» Mathematics » Arithmetic Progressions
Question
If a, b and c are in G. P. with and is an integer, then form a sequence ________.
Choices
Choice (4)  Response  

a.  In which the reciprocals of the terms form an A. P. 

b.  Which is a G. P. 

c.  Which is an A. P. 

d.  All of the above 

Question number: 252
» Mathematics » Coordinate Geometry
Question
The coordinates of the points of trisection of a segment joining and is ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 253
» Mathematics » Quadratic Equations
Question
The difference of the roots of is
Choices
Choice (4)  Response  

a. 


b. 


c.  8 

d.  Question does not provide sufficient data or is vague 

Question number: 254
» Mathematics » Arithmetic Progressions
Question
The AM between and is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  All of the above 

Question number: 255
» Mathematics » Arithmetic Progressions
Question
The numbers of number which have 2,3, 6,5 as factors between 1 and 1000 is
Choices
Choice (4)  Response  

a.  33 

b.  30 

c.  38 

d.  28 
