In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

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

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

John was driving a bus and got stuck when passing through an underpass. Then came Jacob with a needle and got the bus out of the underpass.

What did the boy do?

You need to move three matchsticks to form three squares. Can you do it?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

What is so fragile that saying its name breaks it?