Science quiz
The Fibonacci sequence: first 20 numbers
Start with 1 and 1, then keep adding the last two numbers. Type the first 20 terms in order; each fills as soon as it is right.
- Format
- Type them all
- Items
- 20 answers
- Limit
- 4:00
- Level
- Medium
- Checked
- 2026.10.03
- Answers
- 20
- Time limit
- 4:00
- Order
- One at a time, no skipping
- Matching
- Case and accents ignored
- Answer each item in turn; the next appears when you get it right.
- Press Enter to check a guess.
- Pause whenever you like (Esc). The board hides while the clock is stopped.
Type the Fibonacci numbers in order.
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About this quiz
In the Fibonacci sequence every number is the sum of the two before it: 1, 1, 2, 3, 5, 8, 13 and so on. The ratio between neighbours creeps ever closer to the golden ratio, about 1.618.
- The 12th Fibonacci number is 144, which is 12 squared.
- The 20th Fibonacci number is 6,765.
- Every third Fibonacci number is even.
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