Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

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?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

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?

With the help clues provided in the image, can you find the 5 digit key?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

I have feet, but no legs. Which animal Am I?

What does does this rebus picture means ?

why number 8549176320 is one of a kind?

Which alphabet letter is a question?