Amazing Magical Picture.....

Look at the red dot carefully. just keep looking at it,
 concentrate for one minute with both eyes.
The blue circle will disappear and then reappear.

If you don't see any changes after two three attemps... this means you are not able to concentrate.... 

Lets see how quick you can solve Matchstick puzzle..

How many squares are there in the following image?

Solving matchstick puzzles looks easy, but make sure you count all.....

Try to answer in 15 seconds..

To know correct answer....scroll down

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Answer:

There are total 16 squares...
 4X4 squares : 1
 3X3 squares : 1
 2X2 squares : 5
 1X1 squares : 9