Why is the longest human nose just 11 inches?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

What has 88 keys?

When a clock is observed, the hour hand is at a minute mark and the minutes hand is six minutes ahead of it.

When the clock is observed again after some time, the hour hand is precisely on a different minute mark and the minute hand is seven minutes ahead of it.

Can you calculate how much time has elapsed between the two observations?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

I am sure no one can have two things for dinner. what are they?