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.

Arrange the numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 above and below the division line in a manner that the thus formed fractions equal to 1/3.

(You can use one number only once)

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

A man dies of old age on his 25 birthday. How is this possible?

I am Huge on Sunday and Saturday.
I am small from Tuesday to Thursday.
I do not exist on Monday and Friday.
Who am I?

Can you spot the hidden girl in the picture below?

Can you make a six-letter word using the letters N, A and B ?

I can write cow in 13 letters.

Can You?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?