Question 390287
It is quite possible to solve without multiplying or a pattern.


12 is congruent to 2 modulo 10 (the remainder when 12 divided by 10 is 2), and 8 is 8 modulo 10. Therefore, 12*8 == 2*8(mod 10) == 16(mod 10) == 6(mod 10) so the units digit is 6.


(The == symbolizes a triple horizontal line, which is used to denote equalities in modular arithmetic)