What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

What does a man do only once in his lifetime, but women do once a year after they are 29?

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

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

Solve the equation in the image by looking at the pattern closely.

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Sherlock breaks into a crime scene. The victim is the owner who is slumped dead on a chair and have a bullet hole in his head. A gun lies on the floor and a cassette recorder is found on the table. On pressing the play button, Sherlock hears the message 'I have committed sins in my life and now I offer my soul to the great Lord' and followed a gunshot Sherlock smiles and informed the police that's its a murder.

Why did he think so?

Can you count the number of triangles in the given figure?

Identify Me

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