My first guest without proving is choice a)123 because that is the only one that ends in odd. Also, from knowing that when you deal with even multiplication the outcome is even, thus the total number of choices is even and since there is only one way to get all answers correct, the remaining incorrect ways must end in odd.
Proof:
look at complimentary set:
total- compliment = direct
4*4*4-1=63, multiple choice question is flawed.
-Im available for online tutoring.
