A point is picked inside a cube so that it is decomposed into 6 pyramids, the bases being the faces of the cube. The volumes of five of those pyramids are 2, 5, 10, 11, and 14.
What is the volume of the sixth pyramid?
(In reply to
off the top of my head (spoiler) by Steve Herman)
same reasoning: 2--->14; 5--->11; 10 ---->6