It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Count the number of squares in the picture below.

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

What has 88 keys?

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?

Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (for example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (for example, 4 and 2 can be combined to form 4/2 or 2/4)

Question: how can we do this?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

I can write cow in 13 letters.

Can You?

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

O T T F F S S ?