NSTSE (National Science Talent Search Exam Unified Council) Class 10: Questions 389  394 of 1484
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Question number: 389
» Mathematics » Arithmetic Progressions
Question
A man saves Rs. 80 in a certain year and in each year thereafter he saves Rs. 20 more than the preceding year. In how many years will his total savings amount to Rs. 3,680?
Choices
Choice (4)  Response  

a.  15 years 

b.  16 years 

c.  27 years 

d.  23 years 

Question number: 390
» Mathematics » Surface Area and Volumes
Question
The diameter of a copper sphere is 6 cm. It is beaten and drawn into a wire of diameter 0.2 cm. The length of wire is ________.
Choices
Choice (4)  Response  

a.  3000 cm 

b.  6000 cm 

c.  1800 cm 

d.  3600 cm 

Question number: 391
Question
= ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  Question does not provide sufficient data or is vague 

Question number: 392
» Mathematics » Coordinate Geometry
Question
If and are the midpoints of the sides of , the area of the triangle is ________.
Choices
Choice (4)  Response  

a.  55 sq units 

b.  110 sq units 

c.  12 sq units 

d.  27.5 sq units 

Question number: 393
Question
What should be subtracted from to get ?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 394
Question
Simplify .
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

