Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

There was a kingdom in which the king had no heir to take over his thrown. Even the queen was dead and he himself was on the verge of dying. He thought about it and then summoned all of the teenagers. He gave one seed each to all of them and asked them to grow the plant. He announced that the one with the most beautiful plant will become the king/queen of the empire after the death of the king.

After a month, all of them were called. The king looked at all of the plants but announced the girl with an empty pot as the queen of the empire. Why?

Why 1729 is a magic number? Answer Logically.

What runs around the whole yard without moving?

What can you catch but never throw?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

It is always ahead of me yet I can never see it. What is it?

A bus driver was heading down a street in Mexico. He went right past a stop sign without stopping, he turned left where there was a "no left turn" sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?

I am sometimes honest
Sometimes dishonest
I can be sweet and also bitter
I can hurt you real bad and
also make u smile and blush ☺️
What am I?

What does a man do only once in his lifetime, but women do once a year after they are 29?