Fibonacci

Spot the sequence. Beat the clock.

Score

Streak

Best

Is this a Fibonacci number?

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A number flashes on screen — decide whether it belongs to the Fibonacci sequence
Tap Yes if it does, No if it doesn't
Each round you have a few seconds to answer — the timer shrinks as your streak grows
Correct answers add points (longer streaks = bigger bonus); a wrong answer or running out of time ends the game
The Fibonacci sequence: each number is the sum of the two before it

1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233…

Ready?