I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Peter wakes up daily to pick up his cycle and crosses the border between Spain and France daily with a bag on his shoulder. He is investigated daily by the officials but they don't find anything suspicious.

If we tell you that he is smuggling something what would it be?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

Queen Elizabeth organised a royal party.

To Avoid uninvited guest royal family set a password.
Jack (an uninvited person) plan to enter the party. He stand nearby the door.

First guest comes, the security person said 'twelve' and guest replied with six.
Second guest comes , the security person said 'six' and guest replied with 'three'.

Jack thought is enough and he walked to the entry point. The security person said 'eight' , Jack replied smilingly 'four'.
He was immediately thrown out of the party. why ?

When it's bad luck to meet a black cat?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

What is the next number in the series?

15 29 56 108 208 ?