this one is really simple, i think divide it as half (6-6). r4 Y; ?2 J+ S- ^3 O8 L
weigh 3-3 , if one side is heavier, weigh 1-1 -> you will know which one is heavier7 U6 D/ Z& r- R/ p/ G
If the above doesnt work
) l- f$ U9 k' k& R* y2 D8 f" |; Gweigh 3-3 of the other group (2nd chance)
8 q* p( b) s4 e/ }$ x: r! s* `. \then weigh 1-1 from heavier group (3rd chance)-> you will know which is heavier |