Basic Mathematics (KVPY StreamSA (Class 11) Math): Questions 125  129 of 164
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Question number: 125
» Basic Mathematics » Arithmetic » Number Games
Question
Consider an incomplete pyramid of balls on a square base having 15 layers; and having 10 balls on each side of the top layer. Then the total number N of balls in that pyramid satisfies
Choices
Choice (4)  Response  

a.  60000 < N < 7000 

b.  4000 < N < 5000 

c.  5000 < N < 6000 

d.  3000 < N < 40000 

Question number: 126
» Basic Mathematics » Geometry » Triangle and Properties
Question
The number of values of a for which there is an isosceles triangle with sides of length , and is –
Choices
Choice (4)  Response  

a.  1 

b.  0 

c.  2 

d.  3 

Question number: 127
» Basic Mathematics » Algebra » Solutions to Equations
Question
If a, b, c, d are positive real numbers such that, , then is –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 128
» Basic Mathematics » Arithmetic » Rates, Speeds and Unitary Method
Question
A ladder 12 cm long is leading against a wall. The bottom of the ladder is pulled along the ground, away from the wall, at the rate of 3 cm/sec. How fast is its height on the wall decreasing when the foot of the ladder is 5 cm away from the wall?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 129
» Basic Mathematics » Geometry » Polygons With More Than 4 Sides
Question
25 sphere of same size are made from melting a solid cylinder of 20 cm diameter and 9 cm height. The diameter of each sphere is:
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

