Riddle: Why Does  1 = 3  2 = 3  3 = 5  4 = 4  5 = 4  6 = 3  7 = 5  8 = 5  9 = 4  10 = 3
Answer: Just count how many letters are in the number  For Example  1 has 3 letters  2 has 3 letters  3 has 5 letters  4 has 4 letters  5 has 4 letters and so on