1. I am a 4 digit number.

  2. The product of my first and last digits equals the sum of my middle digits.

  3. My thousands digit is equal to one half of my units digit.

  4. My thousands digit is equal to one third of my hundreds digit.

  5. My tens digit is 3 times my thousands digit.

  6. None of my digits are zero.


      Who am I?











Answer: I am 3996.