NSTSE (National Science Talent Search Exam Unified Council) Class 9: Questions 428  435 of 2000
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Question number: 428
Question
If the angles of a triangle are in the ratio 3: 2: 1 then the triangle is
Choices
Choice (4)  Response  

a.  Right angled isosceles 

b.  Acute angled 

c.  Right angled 

d.  Obtuse angled 

Question number: 429
» Mathematics » Linear Equations in Two Variables
Question
The solution of the equation is ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 430
» Mathematics » Heron's Formula
Question
The base of an isosceles triangle is 14 cm and its perimeter 108 cm. Then its area is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 431
Question
The real factors of are
Choices
Choice (4)  Response  

a.  Does not exit 

b. 


c. 


d.  None of the above 

Question number: 432
Question
In , if and , then =
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 433
Question
Which of the following statement is correct?
Choices
Choice (4)  Response  

a.  The difference of any two sides is less than the third side 

b.  A triangle cannot have two obtuse angles 

c.  A triangle cannot have an obtuse angle and a right angle 

d.  None of the above 

Question number: 434
Question
The arithmetic mean of first six natural numbers is
Choices
Choice (4)  Response  

a.  3 

b.  28 

c.  4 

d.  7 

Question number: 435
Question
Two sides of an isosceles triangle are 5 cm and 9 cm. Then the length of third side is
Choices
Choice (4)  Response  

a.  5 cm 

b.  9 cm 

c.  5 cm or 9 cm 

d.  Question does not provide sufficient data or is vague 
