World's Hardest Riddles With Answers

#501 - Confusing Probability Puzzle

You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven year old boy and a new born baby.

You ask him, "Does either of the family have a girl?"

To this he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $200."

Which family do you think is likely to have a girl ?

#502 - Knights Tour Chess Puzzle

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

#503 - Four Squares Matchsticks Puzzle

In the formation, you can see a few arranged matchsticks. Can you form three squares by moving just three matchsticks ?

#504 - Who Is The Murderer Riddle

Role Action
Block Prevents the target player from acting
Redirect Change target player target.
Save Protects the target player from death.
Seer Sees all actions that occurred
Murderer Kills the target player

Following five players are playing:
Andy
Brian
Chris
Daniel
Fred

You are Andy the Seer and you saw the following things:
a) Brian was redirected to Chris.
b) Chris was blocked.
c) Daniel was killed.

Who is the murderer then?

#505 - Trick Story Puzzle

A man was telling some of his war stories to his grandchildren.
"When the World War I was on the verge of end, I was awarded for my bravery for I had saved a group of my men." He coughed and then added, "When we were fighting in northern France, an enemy soldier threw a grenade at us. Before it could explode, I picked it up and threw it away. For my act of bravery, right before the war ended, A General gave me a sword engraved with the words "Awarded for Display of Bravery and Heroism in World War 1"."

Hearing this, one of the grandson spoke up. "Grandpa, this is not a true story. It can"t be true!"

The truth is that it was not. How did the grand children know it?

#506 - Famous Chess Board Puzzle

In a chess board, the queen piece can movie horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

#507 - Hard Tricky Maths Trivia Question

Can you think of three numbers that gives a prime number as their product and also the difference between the second and first is equal to the difference between third and second?

#508 - Measure Time Interview Puzzle

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

#509 - Popular Missing Number Sequence

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

#510 - 8 Letter Picture Puzzle

In the given picture, you can find two letters to be missing. When two particular letters are placed in the missing spots, you get an eight letter word while reading in anti-clockwise direction. Can you find out the missing letters and the missing word eventually?