About the human brain.

Face optical illusion

Quiz!

1.Is there a 4th of July in England?
2.How many birthdays does the average man have?
3.Some months have 31 days; how many have 28?
4.In baseball how many outs are there in an inning?
5.Is it legal for a man in California to marry his widow's sister?

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Optical illusion

Plus one/Minus one maze

Starting at the 1 in the upper left corner, can you make your way to the 10 in the lower right? On each turn, you can move to any space in the same row or column, as long as the number you move to is one greater or one less than your current number.

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Riddles

1. It walks on four legs in the morning, two legs at noon and three legs in the evening. What is it?
2. What always runs but never walks, often murmurs, never talks, has a bed but never sleeps, has a mouth but never eats?
3. At night they come without being fetched. By day they are lost without being stolen. What are they? 
4.The person who makes it, sells it. The person who buys it never uses it and the person who uses it doesn't know they are. What is it?
5. The more you have of it, the less you see. What is it?

Face optical illusion

Johnny depp optical illusion

Riddles

1. What building has the most stories

Answer: library

2. Jack the cowboy rode to an inn on a Friday and three days later, he rode away from the inn on Friday. How is this possible?

Answer: the horse’s name is Friday.

3. What four letter word can be read upside down, downside up and up to down?

Answer: noon

Optical illusion

Optical illusion eye

The maze

Physics or Math?

Optical illusion

How many triangles can you count?

Optical illusion

Einstein quote

Might as well check another Einstein quote below.

 

Einstein quote Top Einstein quotes

This looks impossible!

Hitori

Hitori is a japanese logic puzzle game, played on a grid of squares. Each squares contains a number, and some numbers are repeated in each row and column. The aim is to fill out the squares so that there are no similar numbers in each row or column.

Optical illusion

Did you know?

Optical illusion

Optical illusion

Can you see the deer silhouette in the background?

Did you know?

Einstein quote

More about Einstein quotes below

3x3 magic square

This is a 3x3 magic square. In order to solve it numbers from 1 to 9 should be filled in the empty cells so that the sum in each row, column and diagonal would be equal. In the case of a 3x3 grid the sum must be 15. Can you fill it so that each row,column and diagonal has a total sum of 15?






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Did you know?

Optical illusion

Lady or skull?

How many faces can you see?

Killer Sudoku

Killer sudoku is similar to sudoku. No number is revealed explicitly. The sum of numbers in a sudoku puzzle is given as clue.

What is wrong with this castle?

KenKen logic game

KenKen is a japanese puzzle game similar to Sudoku or Kakuro. You have to deal with numbers, in this case it is a 4x4 grid so you have to fill each row and column with numbers   1,2,3 and 4. Groups of boxes are surrounded  by bold lines which are called cages. Cages can be one ore more in rows, columns or L shaped  and each cage contains a number and the mathematical operator. To fill the cells in the cage you need to  combine numbers with the operator. The more grids the harder KenKen becomes. 9x9 grids are difficult puzzles.

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Floating Maze

Real world illusion

Einstein quote

Which is the identical to the read shape?

Which of the seven shapes is identical to the red one? There may be more than one which is exactly the same.

Optical illusion

A rebus

Optical illusion

Optical illusion

Kakuro puzzle

How to play kakuro

Learn more about kakuro puzzle below:

Optical illusion

Bridge or ship

Maze

Can you find the way out?

Brain teaser

Spinning Ladybugs Illusion

Convex or Concave

A hill or a crate? Another  convex or concave illusion.

Another Einstein quote

Natural tree

Moving wheels

How many human faces can you count?