Square roots and Cube roots

Square roots and Cube roots:

11) The number which is not expressible as the square of any natural number is

  1. 1369
  2. 5041
  3. 7056
  4. 9852

12) What is the smallest number to be subtracted from 549162 in order to make it a perfect square?

  1. 28
  2. 36
  3. 62
  4. 81

13) The smallest number which when multiplied to 3600 yields perfect cube is

  1. 50
  2. 60
  3. 40
  4. 100

14) If 2*3 = √13 and 3*4 = 5, what is the value of 5*12?

  1. 17
  2. 29
  3. 12
  4. 13

15)  =?

  1. 25
  2. 125
  3. 625
  4. None of these.

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