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

In a Society, there are over 100 flats.

Flat 1 is named the first flat.
Flat 2 is named the second flat.
Flat 3 is named the third flat. And So On.....

A visitor decides to walk through all the flats, and he finds all the flats except flat 62.
Anmol later founds that the locals of the town have given it another name.

What is the name of the Flat?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

A sundial has the fewest moving parts of any timepiece. Which has the most?

Can you fill the blank with the correct number?

6 30 870 756030 _____

If 21x = 79x, what is the value of x?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

What can you hold in your right hand, but never in your left hand?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?