Can you solve below mathematical equation?

2^1234 - 2^1233

When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.

When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.

Can you calculate how much time has elapsed between the two observations?

What is the fastest way to double your money?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Rearrange the letters in "new door" to make one word.

What country can make you shiver?

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?

Below rebus represent famous DiCaprio movie. Can you name it?

Look at the picture and find out which square is not linked with any of the other squares.

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?