How to do several things at once

In reality the brain switches between tasks more than it does them at the same time. You can train it to switch quickly.

1. Don't try to look at both areas at once: practice switching quickly from one to the other.
2. Make one of the tasks almost automatic; with practice, the even-or-odd one ends up doing itself.
3. When the rule changes, make a tiny pause and repeat it in your head ('now red') before going on.
4. Breathe and don't tense your shoulders: stress makes switching tasks worse.
5. If you miss, don't dwell on it: the next stimulus has already arrived.

Start slowly and speed up only when the first levels feel effortless.

Guides to improve

• How to improve your reflexes in the game
• How to do math faster in your head
• How to remember long numbers
• How to follow many balls at once
• How to find the odd one out faster
• How to memorize lots of icons

Practical tips for the game. They are not medical advice and don't promise to improve your health or intelligence.