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

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

How many letters are in the alphabet?

Can you count the number of triangles in the given figure?

Can you count the number of matches in the picture below ?

You can see three almost identical images below. Can you spot the odd one out from them?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

How can you drop a raw egg from a height onto a concrete floor without cracking it?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)