Intelligent Quotient - Its the ability to come sucessfully with new situations & capacity to use abstract ideas for solving those problems.

Calculation:      Mental age/Chornological age * 100

 Levels:

           0 to 25         = Profound mental retardation (Idiot)

    20-25 to 35 - 40 = Severe mental retardation (Imbacile)

     50-55 to 70       = Moderate mental retardation (Moron)

          80 to 90       = Dull normal/ low normal

          90 to110      = Normal

        110 to 120      = Bright normal

        120 to 130     = Superior

        130 to 140     = Very superior