Sharpen the cognitive skills your IQ reflects — verbal, logical, quantitative, visual-spatial, working memory and deductive reasoning — plus an AMC 8-style math challenge. Earn XP, keep a daily streak, and play as much as you like.
Five cognitive domains, a word-puzzle forge, and a competition-math arena. Each drill mixes several question types and generates them fresh every round, so a domain keeps surprising you however long you play.
Continue a number run, extend a letter series, or spot the value that breaks the rule.
2, 5, 11, 23, … what comes next?
47 — each term doubles and adds one.
Rule induction — spotting structure from few examples, the core of most non-verbal reasoning items.
Mental arithmetic, percentages, fractions of a whole, and ratio splits — no calculator.
13 × 7 − 9 = ?
82 — 91 minus 9.
Calculation fluency. Speed here frees attention for the reasoning parts of a timed test.
Complete an analogy, pick a synonym or antonym, or find the word that does not belong.
Thermometer : Temperature :: Barometer : ?
Pressure — instrument to the quantity it measures.
Relational vocabulary. The trick is to state the link in words first, then test each option against it.
Rotate or mirror a figure mentally, or find the shape that breaks the set.
Rotate ↑ by 135° clockwise.
The arrow pointing down-right (↘).
Mental rotation — holding an image while transforming it, one of the most trainable spatial skills.
A digit run flashes, then vanishes — report a position, read it backwards, or total it.
7 2 9 4 6 — which was 4th?
4 — count positions as they appear, not after.
Span with interference. Chunking digits in pairs is the single biggest win here.
Unscramble anagrams, find hidden words, link compounds, and restore missing vowels.
Which word completes BOTH? SNOW + ? · ? + GAME
BALL — snowball and ballgame. Test each option against both halves.
Lexical flexibility: holding a letter set in mind while searching for a word that fits it.
Contest-format problems, five choices, full worked solution after each.
What is the units digit of 7^2023?
3 — powers of 7 cycle 7, 9, 3, 1 and 2023 ≡ 3 (mod 4).
Competition technique: cycles, divisor counting, ratio and counting arguments.
Technique you can apply on the very next question — and on test day.
On analogies, say the link out loud — "instrument to what it measures". Options are written to be plausible; deciding the rule first stops a near-miss from pulling you off.
Working-memory span is roughly four items, not seven. Reading 7 2 9 4 6 as "72, 94, 6" stores three chunks instead of five and survives interference far better.
For a number series, take first differences. If those are constant it is arithmetic; if they grow evenly, take second differences; if the ratio is constant, it is geometric.
Pick one feature — an arrow tip, a corner — and track only that through the turn. Rotating the entire shape mentally is far more expensive and error-prone.
On multiple choice, a rough magnitude often eliminates three options. 13 × 7 is "a bit over 90", which usually leaves one candidate worth calculating exactly.
A timed form rewards the cheap marks first. If a question has not resolved in about 40 seconds, move on — the next one may take ten.
We keep this honest — here is what practice does, and what it does not.
Most people underperform because a question type is unfamiliar, not because the ability is missing. Seeing the formats first lets you show your true level.
Drill the cognitive area that lags — verbal, logical, quantitative, visual-spatial, or working memory. Each game maps to a real domain on your profile.
Five minutes a day keeps your reasoning engaged. The streak, XP, and badges make coming back tomorrow easy.
The Brain Gym includes a dedicated AMC 8-style math arena: original competition-math problems in the AMC 8 format (five choices, no calculator) across algebra, number theory, geometry, counting, and probability. Play a fresh daily set of five, or practice endlessly, with a full worked solution after every problem. These are original problems written in the AMC 8 style — not official AMC exam questions, which are copyrighted by the Mathematical Association of America.
They sharpen the specific skills you practice and your comfort with test formats, which helps you perform at your true level. But no game reliably raises your underlying IQ — anyone promising a big "IQ boost" from puzzles is overselling.
Yes — every game, the daily challenges, and the AMC 8 math arena are completely free, with no signup required.
Five cognitive domains — verbal, logical, quantitative, visual-spatial, and working memory — the same domains a full IQ test measures, plus a dedicated AMC 8-style math arena spanning algebra, number theory, geometry, counting, probability and statistics.
No. They are original problems written in the AMC 8 format and difficulty. Official AMC exam questions are copyrighted by the Mathematical Association of America, so we do not reproduce them.
Each day gives you five cognitive puzzles (one per domain) and five AMC 8-style math problems — the same set for everyone, refreshed every day. Keep a daily streak and earn XP as you go.
Drills sharpen the skills. The full 30-question test gives you an estimated IQ, percentile, and a five-domain cognitive profile.
Take the full IQ test