A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Replace the question mark with the correct number below.

The more of this there is, the less you see. 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?

Different lights make me strange by changing me into different sizes. What am I?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

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?