Hey

Do you know what Z6 means? What exactly is your question?

(1*1) mod 6 = 1

(1*2) mod 6 = 2

....

(1*5) mod 6 = 5

(2*1) mod 6 = (1*2) mod 6 = 2

(2*2) mod 6 = 4

(2*3) mod 6 = 6 mod 6 = 0

(2*4) mod 6 = 8 mod 6 = 2

(2*5) mod 6 = 10 mod 6 = 4

....

and so on.

Does it help?

Regards, Rapha