You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

What number when divided in half becomes zero?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

What is the end of everything?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

What has many keys but can’t open a single lock?

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?