Can you convert the number zero(0) into a positive number using just one mathematical operator ?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

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?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

Which English verb becomes past tense just by rearranging the letters?

What has many teeth, but cannot bite?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

I have no life, but I can die. What am I?