Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

What seven-letter word has hundreds of letters in it?

What is the centre of gravity?

ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

A crime was committed at baker street. Ibrahim Dakota who was shot in the stomach was the main suspect. Sherlock questioned the suspect. The conversation started as:
Sherlock: What's your story, Ibrahim?
Ibrahim: I was walking around baker street and suddenly a man from the back shot me. I ran as fast as I could to save my life".
Sherlock: That is enough (and ask the police to arrest him).

Why does Sherlock think he is the murderer?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?