Answer:
Where do you go in through one hole and come out through two holes at the same time?
Dies half its life. Lives the rest. Dances without music. Breathes without breath.
Put into a pit, locked beneath a grate, guarded through the night, yet it still goes out.
What can run but can’t walk?
A precious stone, as clear as diamond. Seek it out while the sun's near the horizon. Though you can walk on water with its power, try to keep it, and it'll vanish in an hour.
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?