Answer:
I am the key that is the hardest to turn
Light hides me and darkness kills me. What am I?
I am an odd number that become even when beheaded.
Iβm tall when Iβm young. Iβm short when Iβm old. I can light up your world. What am I?
I am the kind of soda you must not drink.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?