To get the square root of numbers, find a number that if it's multiplied to himself, it must be the result, but, here are some of the rules:
      - A perfect square can't end in 2,3,7, or 8. 
      - A perfect square must have its square root odd/even depending on the number.
      - A perfect square must have even-numbered zeroes.
 Getting it in the hard way requires multiplication, square root function, subtraction, and maybe division.