Replace the question mark with the number below given a simple math problem.

Two Twins Jack and Jill were standing back to back and suddenly they started running in opposite direction for 4 kilometres and then turn to left and run for another 3 kilometres.

what is the distance between the Baggio twins when they stop ?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

Three people are in a room. Ronni looks at the Nile. The Nile looks at Senthil. Ronni is married but Senthil is not married. At any point, is a married person looking at an unmarried person? Yes, No or Cannot be determined.

There are 3 apples in the basket and you take away 2. How many apples do you have now?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?