How old is your brain?

The site instructions are in Japanese, so read below!
1. Touch 'start'
2. Wait for 3, 2, 1.
3. Memorize the number's position on the screen, then click the circle from the smallest number to the biggest number.
4. At the end of game, computer will tell you the age of your brain.
5. Forward the message and type your age in the subject line.

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Good luck !