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Watch the circle light up, then click the same slices back in order.
Each round adds one more step.
Games like this one train your working memory — the ability to hold and recall a growing sequence of information in the moment. That's the same skill you rely on for following directions, doing mental math, or remembering why you walked into a room.
Flip two cards at a time and find every matching pair in as few moves as possible.
Memory fact
Most people can hold only about seven items (plus or minus two) in short-term memory at once — a limit known as "Miller's Law," described by psychologist George Miller in 1956.
Memorize the number before it disappears, then type it back from memory.
Memory fact
Psychologist Hermann Ebbinghaus discovered the "forgetting curve" in the 1880s, showing that we lose most new information within days of learning it — unless we deliberately review it, which is why spaced repetition works so well.
Memorize the words, then pick them back out of the grid.
Memory fact
Psychologist Alan Baddeley's model of working memory includes a "visuospatial sketchpad" — a mental workspace dedicated to holding and manipulating visual and spatial information, separate from the system that handles words and sounds.
Memorize which tiles light up, then click them back from memory.
Memory fact
The "n-back" task below was developed in 1958 and is still one of neuroscientists' go-to tools for studying and training working memory — the ability to hold information in mind while actively using it.
Click "Match" whenever the current letter is the same as the one shown two letters earlier.
Memory fact
Sleep plays a critical role in memory consolidation — getting a good night's sleep after learning something new helps transfer it from short-term to long-term memory.
Click the color the word is printed in — not the word itself. Answer fast before time runs out.
Focus fact
This game is based on the Stroop effect, discovered in 1935 — our brains read words so automatically that naming the ink color of a mismatched word takes real, measurable mental effort.
Every letter is the same except one, mirrored. Spot it before time runs out.
Focus fact
This kind of visual search task is used by researchers to study selective attention — the brain's ability to zero in on one relevant detail while filtering out a field of near-identical distractions.
Tap the first and last letter of a hidden word to select it. Find them all before time runs out.
Focus fact
Scanning a busy grid for a hidden pattern draws on the same visual search skills used in proofreading and spotting errors in dense data — the more you practice, the faster your brain learns to filter out noise.
Memorize the number, then type it back in reverse order.
Memory fact
Reciting a sequence backward is measurably harder than reciting it forward — backward digit span is a classic test of working memory, since it forces your brain to hold and actively reorder information rather than just store it.
What each game category badge means.