A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

What has a ring but no finger?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?