Numeric class « Number « Ruby

1.The integer? method comes from the Numeric class
2.Is a number integer
3.More Math Methods
4.Get the ceiling or floor of a number (from Float, Integer, or Numeric):
5.Or round a number up or down (Float, Integer, or Numeric):
6.Get the next integer with next (or its alias succ):
7.Find out the modules Numeric class resides