JEE, NEET, Foundation & CBSE

A certain sum of money triples itself in 5 years at simple interest. In how many years it will be five times?
  1. 5
  2. 10
  3. 12
  4. 33
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If x + (1/x) = 2, then what is the value of x64 + x121?
  1. – 2
  2. 0
  3. 2
  4. 1
If the diameter of a sphere is 14 cm, then what is the surface area (in cm2) of the sphere?
  1. 616
  2. 308
  3. 462
  4. 636
R
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