Solution:

This is a popular illusion. The angular placement of the two rectangles is the reason behind the illusion. It is just the matter of perception. You can perceive it as pointing towards you or even away from you. If you concentrate a bit, you can find both of the results. Take it as an exercise and try to perceive the both.

Solution:

This illusion is the proof of how smart our brain is. In the first figure, the three circles are cut and placed in a manner that we can easily trace a triangle on the top of them even though it is not there. Similarly in the second figure, we can make out a sphere on which the spikes are grown. It's awesome right?

Solution:

As you scroll the page, you will perceive an effect of rolling waves. The reason behind this is not just one. First, we have alternate placement of two different shades of green. After that, there is the placement of the white and pink flower kind of pattern which plays a major role here. This is why we find the pattern to be rolling in a wave form or at times like hills and valleys.

Solution:

The moment we remove the background circles, you find out that it indeed is a square by all means. So, you know that the whole illusion was created due to the concentric circles. Due to them it appears that the straight lines of the square are bent from the middle. It is crazy right?

Solution:

Solution:

Solution:

Solution:

Solution:

Solution:

Solution: