Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

What does the below image rebus riddle means ?

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

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

How is the moon similar to a dollar?

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?