Find out the missing number in the picture attached:

How many letters are in the alphabet?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

Which word does the below Plexor means ?

To attend world science seminar, A famous chemist from Mexico visit
London. In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "76-20-44 79-16-22-7"

A local detective Jack was called to solve the case,

After reading the note, Jack instantly asked the police to arrest the murderers.

Who are the murderers?

what one word does the below rebus identifies?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

Which letter of the alphabet has the most water?

I am the fastest animal but cannot climb the tree. What am I?

What does this simple rebus mean?