Free Online Challenges & Learning Resources

Quickly test and improve Mental Math, Typing, Listening skills and much more. Start now with no sign-up or payment required.

Today's Challenge

New day, new challenge. Come visit us every day to try something new!

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Try to guess a secret message encrypted with a Caesar Cipher to train your deductive logic and cryptanalysis skills.

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Test your reaction time in milliseconds with this simple and fun challenge.

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Try to guess a secret message encrypted with a Caesar Cipher to train your deductive logic and cryptanalysis skills.

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Sharpen your mental math skills with a variety of engaging arithmetic challenges.

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Test your mental flexibility and attention with our online Stroop effect test.

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Practice your listening skills by listening to radio stations in different languages from around the world.

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Engage with interactive exercises that show your results right away.

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Access all challenges without any cost or registration.

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Share your scores on social media and challenge your friends.

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Install this site on your device as an app to play seamlessly on any device, even offline.