Test: Are you observant?

Are you observant? Find out with this test.

Most people won't get the right number. Even after trying again!

#33 Half full or half empty?

Same ol' question. But this time you need to measure it!

Since the glass is quadratic, you can just tilt it.

Illusion: Lights On

Can you see the shining light bulb?

Releasedate adaption

Hello everbody,

thank you for participating in this blog and my Youtube channel. I hope you enjoy em. Unfortuantely I have to travel quite a bit in the next time. So I have to reduce the video release frequency. From now on, there will only be one video every other week.

I am sorry for the inconvenience... I hope, you will stay with me nevertheless. As soon, as I have more time again, I will go back to atleast a weekly update!

regards your Dr. Riddle

#32 Squares

There are 16! Squares in the picture.

Illusion: Acoustic Illusion

After 2 weeks of vacation riddle me this is back! With a brand new illusion. I hope you guys will enjoy that one as much as I did.

#31 Cheryl's Birthday Problem

There is actually more then one correct answer. But the most common answer is July 16th. Here you can find a very neat explanation of the other possible answers:

#30 Four balls riddle

You have to form a pyramid

Todays Riddle

If you have me, you want to share me. If you share me, you haven't got me. What am I? 

The answer is "a secret".

Illusion: Optical Color Illusion

Check out this awesome illusion. Just stare at the picture for 20 seconds and be amazed!

#29 Bridge Problems

Actually, there is no solution for this problem. It's only an april fool :) Check out this wiki article if you want to know, why there is no solution.