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

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

In my garden, I have many trees but only one of them is the mango tree. In these mango trees, there are some mangoes(as expected).

But after a strong wind, there are neither mangoes on the tree nor on the ground. Explain?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Find the next number in the series.
1 10 24 43 67 ?

What kind of storm is always in a rush?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

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

What has hands, but can’t clap?