Good Riddles

Answer: Tom puts one of his locks on the box with the ring in it. When Sally gets it she puts one of her own locks on the box and sends it back to Tom. Finally Tom takes his lock off of the box and sends it back to Sally who can then unlock her own lock and retrieve the ring.

Answer: The iron block.

The iron will make the water level higher because both blocks will actually make the water level drop most likely. In the boat they have a larger effect on the water level (raise the water level) and then when they are dropped into the water the lighter one (iron), will make the water level drop less because it is lighter and has less effect on the water from the boat but displaces the same amount of water as the gold when dropped into the water.

Answer: An umbrella.

Answer: A library.

Answer: Fire