Sequences
What comes next? Spot the pattern in number sequences - arithmetic, geometric, Fibonacci, and more
About PlayMemorize Sequences
PlayMemorize Sequences is a number-pattern recognition game · the same shape as the IQ-test classic, generalised to a dozen pattern families. Each round shows a short series of numbers; you pick the next one from a list of distractors. Get it right and the streak grows, miss and the run ends with the rule revealed.
A dozen pattern families. Arithmetic (+n), geometric (×n), decreasing (÷n), Fibonacci (a+b=c), Tribonacci (a+b+c=d), powers (n², n³), primes, triangular numbers (1, 3, 6, 10, 15, …), alternating series (a, -a, a, -a or up-down-up-down), factorials (n!), quadratic sequences (constant second difference), and mixed-operation rules like ×k+c. Harder families unlock as the streak grows.
Every miss is a lesson. The post-round explainer shows the pattern family and the exact rule · "Fibonacci: a+b=c", "Triangular: +1, +2, +3…", "Geometric: ×3". So even a bad guess teaches you the shape, and the next time the same family shows up you recognise it faster.
Progressive difficulty. Early rounds use arithmetic and geometric · the easiest to spot. After 5 correct, Fibonacci and power sequences appear. After 10, triangular and alternating. After 15, factorials and mixed operations. The number of answer choices grows in step, so a high streak round is both harder pattern and more discriminating distractors.
Part of the PlayMemorize family of brain-training games. Runs entirely in your browser, works offline as a Progressive Web App.
FAQ
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What types of sequences are included?
Over a dozen: arithmetic (+n), geometric (×n), decreasing (÷n), Fibonacci (a+b=c), Tribonacci (a+b+c=d), powers (squares and cubes), primes, triangular numbers, alternating series, factorials, quadratic (constant second difference), and mixed operations like ×k+c and +a,×m. Harder types unlock as your streak grows. -
How does my progress save in Number Sequences?
Your best streak is stored locally in your browser. It's a single global record across all pattern families, since the families unlock progressively · a long streak necessarily means you've cleared harder patterns. Sign in to sync the record across devices. -
How does the difficulty scale?
Early rounds use simple arithmetic and geometric sequences. After 5 correct answers, Fibonacci and power sequences appear. After 10, triangular and alternating. After 15, factorials. The number of answer choices also grows, so high-streak rounds combine harder patterns with more discriminating distractors. -
Does it explain the answers?
Yes. After every round, win or lose, the game shows the pattern family and the exact mathematical rule (for example "Fibonacci: a+b=c" or "Geometric: ×3"). Wrong answers turn into a tiny math lesson rather than just a streak reset. -
How do I spot a Fibonacci sequence quickly?
Add the last two terms. If the sum equals the next term, it's Fibonacci-like. The classic 1, 1, 2, 3, 5, 8, 13 is the most famous, but the same rule holds for any starting pair (e.g. 2, 5, 7, 12, 19, 31). Tribonacci is the same idea with three terms summed instead of two.