The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

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?

Find the next number in the following series:
6, 14, 26, 98, __?

You need to remove two matchsticks to make the below equation true. Can you do it ?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

What is common among 11, 69, and 88?

When it's bad luck to meet a black cat?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?