Finally Santa Become Brilliant

Finally santa become brilliant…
Read on…
A sardar and an American met on a plane and had a bet,
That if santa fails to answer his question he must give,
5$ if american fails he has to give 500$.
American : what the difference between earth and moon ?
Santa silently give 5$.
Santa: which is the animal with 3 legs goes to,
The mountain and returns with 4 legs?
The american searches for 2 hrs in laptop and gave 500$,
And asked whats the answer?
Santa silently gave 5$.