How many times can you subtract the number 5 from 25?

For the answer to this riddle check the comments.

Metal Slug Stick is a simple, yet extremely fun Flash shooter game where you control a stickman and blast away enemies with grenades and guns.

A very cool optical illusion where the rings appear to be expanding. The nickname given to this optical illusion by the creator is “Throwing Cast Nets”. Click on the image of the optical illusion to see the image in full-size and to get the full effect.

Throwing Cast Nets Expanding Optical Illusion

If you’ve ever seen those colorful 3D optical illusion books by Magic Eye this text optical illusion works just the same way. Stare at the picture until a 3D image pops out from the rest of the picture. It might help to try and blur your vision or cross your eyes a little to see the 3D effect. We don’t want to spoil the optical illusion for our readers so won’t say what it is, but if you are able to see it feel free to post what it is in a comment. Click on the image to see the full size; it won’t work unless your looking at the full-sized image.

Text Optical Illusion based on Magic Eye illusions