clipped from: www.vsg.edu.au   

Check out the following exercise, guaranteed to freak you out. There's no trick or surprise, but, trust me: just follow these
instructions, and answer the questions one at a time and as quickly as you can! Again, as quickly as you can but don't advance
until you've done each of them... really.

What is:

1+5 ?
2+4 ?
3+3 ?
4+2 ?
5+1 ?

Now repeat saying the number 6 to yourself as fast as you can for 15 seconds. Then click here...