'Three' in the Bible

Now there were six waterpots of stone set there after the Jews manner of purifying, containing two or three firkins apiece.

Jesus answered and said unto them, Destroy this temple, and in three days I will raise it up.

The Jews therefore said, Forty and six years was this temple in building, and wilt thou raise it up in three days?

Why was not this ointment sold for three hundred shillings, and given to the poor?

Simon Peter therefore went up, and drew the net to land, full of great fishes, a hundred and fifty and three: and for all there were so many, the net was not rent.