Question 1

What types of sequences are included?

Accepted Answer

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.

Question 2

How does my progress save in Number Sequences?

Accepted Answer

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.

Question 3

How does the difficulty scale?

Accepted Answer

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.

Question 4

Does it explain the answers?

Accepted Answer

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.

Question 5

How do I spot a Fibonacci sequence quickly?

Accepted Answer

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.