Easily, if the other end of the rope wasn't tied to anything

13

None. If you put a book in it, the bag is no longer empty.

They played different people

25

Nine

88
0 x 0 = 0, 0 x 0 = 0
1 x 2 = 2, 1 x 3 = 3
2 x 3 = 6, 2 X 4 = 8
3 x 1 = 3, 3 x 1 = 3
4 x 2 = 8, 4 X 2 = 8

Your right elbow

Husband and wife

Getting older

A boy, his father, and his grandfather went fishing together

Nothing. Nothing is greater than God, nothing is more evil than the devil, the poor have nothing, the rich need nothing and if you eat nothing you’ll die.