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Test your visual reflexes by clicking as fast as possible when the screen changes color.

Remember the longest number possible and test the limits of your digit span.

Memorize increasingly complex patterns of tiles lighting up on a grid.

Solve arithmetic problems as fast as you can to test processing speed.

Measure your typing speed in words per minute with accuracy tracking.

Test your mouse accuracy and speed by clicking targets as they appear.

Remember the position of numbers in order after they disappear. Can you beat a chimp?

Keep track of which words you have and haven't seen in this verbal recall test.

Remember which squares were highlighted on the grid and select them from memory.

Name the color of the text, not the word itself. Tests cognitive flexibility and inhibition.

Unscramble letters to form words as fast as you can. Tests language processing speed.

Determine which shape completes the pattern. Tests mental rotation and spatial logic.