Since there were 6 slices, and he ate 1/3, 6*1/3= 2, so he ate 2 slices
sides of right angle triangle follows Pythagoras theroem
which states
a^2 +b^2 = c^2
where a , b and c are sides of right angle triangle.
here none of options do not follow this.
so answer is option D
3.(6^(12-10)) = 3× 6^2 =3× 36 =108