Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

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.

How can a man go eight days without sleep?

Solve the counting riddle by identifying the number of triangles in the given picture.

By what process could you make a 'Tea-Table' into food?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

When 99 is considered higher than 100?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?