Answer:
Shorter than my four siblings, but easily the strongest, Sometimes I wear a funny hat.
When one does not know what it is, then it is somethingอพ but when one knows what it is, then it is nothing.
What comes once in a minute, twice in a moment, but never in an hour?
What kind of room has no doors or windows?
I'm not alive but I have 5 fingers what am i
Born in the ocean and white as snow. When I fall back to water I disappear without a trace.