Thanks dude. I thought the answer would be 3. In the page I was reading(

this) the author was describing about congruency for addition and multiplication. I thought for division

0/0≡1mod2

i don't what do you mean by this. 0/0????
0/1≡0mod2

1/0≡0mod2

1/1≡1mod2

Since even*even*even/even is even/even and 0/0≡1mod2, I thought answer is 3. Since the options given were

8

3

12

10

6

Since 3 is the only odd number I thought 3 would be the right answer. How ever there is little confusion in your post. How did you exactly said that 8 is the right answer. It can be either 10 or 12. Could you please explain.

Thank you in advance