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.

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

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

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

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

The centre of the third figure is empty. What digit should fit inside?

Can you find out who is the kidnapper in below Picture and why, Explain ?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.

John gave half of the apples he had plus one more to Jacob. He gave half of the remaining ones plus one more to James. Now, John was left with just one apple.

Can you find out how many did he have in the beginning?