31. Using the drawing above, move the matches marked red to new position to form 4 squares instead of 5.
32. Number 11 goes in the top spot, numbers 16 and 2 to the bottom spots respectively from left to right.
33. In a world with no air resistance, drag or gravity, the ball would technically keep bouncing forever. But in our world, the distance the ball travels would most closely be around 71-72 metres, most probably rounded up to 72 metres.
