Replace the question mark with the correct number below.

John is pretty weird. He likes toffees but hates chocolates. He loves books but never reads. He likes to build his troops in an online game but does not proceed with the war. He likes to go swimming but is afraid of water.

Seeking this behaviour, can you tell whether he likes balloons and parties?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

The captain of a ship was telling this interesting story: "We travelled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly." How can that be possible?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?