Question 1022789
 I am a four digit number. 
a, b, c, d
 My ones digit is four less than my hundreds digit,
d = b - 4
 which is three times my tens digit,
b = 3c 
 which is half my thousands digit,
c = .5a
 which can be divided by 1, 2, and 3 without a remainder.
:
 What number am I? 
The only one I could come up with: 4622, but it's not divisible by 3