A casual screening test, not a medical diagnosis. Find the number hidden inside a circle of colored dots to get a quick read on possible red-green color blindness.

Try test

pts

Mental Math

Solve as many arithmetic problems as you can in 25 seconds. Correct answers earn +1 point, wrong answers cost −1.

Try test

cpm

Typing Speed

Type the sentence shown on screen as fast and accurately as you can. Measures your typing speed in characters per minute (CPM).

Try test

hits

Aim Trainer

Click as many randomly appearing circles as you can before time runs out. Measures the number of targets hit.

Try test

cpm

Typing Practice

Type the sentence as quickly and accurately as possible.

Try test

correct

Stroop Focus

Choose the ink color rather than the word meaning.

Try test

Measure. Compare. Try again.

What tests can I take?

Explore reaction time, click speed, memory, mental math, typing, aim training, and more. Play for free with no sign-up required.

How do the rankings work?

Sign in and save a result to be automatically registered on that test's leaderboard. The more tests you do well in, the higher your Overall Score climbs.

How do I compare my results?

Every result page shows your percentile and the average score among all participants, and you can share a link to your result to compare directly with friends.