Question

Caesar says 5 = 4
Caesar says 6 = 9
Caesar says 9 = 1

According to Caesar, 12 = ?

Answer 1

5
Twelve contains one roman ltr - V
Six contains IX, hence nine
Five contains IV, hence 4

Answer 2

5=4 6=9 9=1 6-5=9-4 1=5 5+6+1=4+9+5 12=18