Facetiously.

If the tide is raising water, then it is raising the ship on water, too. So water will reach still the first rung.

Artery also means a way of transportation, so the road was cut, or being constructed on. No blood was drawn!

Put 3 balls on each side. If one is heavier, then take those three, hold one in your hand and weigh the remaining of the 3 balls(one on each side) If one is heavier then there you go! If they are same, then the one you were holding in your hand is the one. Back to the first step. Ok if the 3 balls are equal, then take those six balls out and weigh the remaining two.

Snowflakes.

The plane was still on the ground.

When it is 15 minutes into 24 hours.

70

The sequence progresses –18, –17, –18, –17.

Notary Big puts the document in the metal tube, locks the lid with one of his padlocks and sends it to notary Small. Notary Small adds one of his padlocks to the lid and sends the tube back to notary Big. Notary Big removes his padlock from the lid and sends the tube back again to notary Small. Notary Small can then open the tube by removing his own padlock again.

A stone that is dry.

A daughter, a mother and a grandmother. The daughter is the daughter of the mother. The mother is the daughter of the grandmother. The mother is the mother of the daughter. The grandma is the mother of the mother.

They were facing each other.