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Fibonacci Numbers - One Minute Sprint

The first two numbers in the sequence are 1 and 1. After that, each number is the sum of the previous two numbers. How high can you go in just one minute?
Answer must correspond to the yellow box
Quiz by Jerry928
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Last updated: August 18, 2022
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First submittedDecember 23, 2014
Times taken18,076
Average score57.7%
Rating4.73
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Number
1
1
2
3
5
8
13
Number
21
34
55
89
144
233
377
Number
610
987
1597
2584
4181
6765
Number
10946
17711
28657
46368
75025
121393
+2
Level 73
Aug 18, 2022
Technically "0" is the first number, so please addit or have it grayed out
+12
Level 75
Aug 18, 2022
That can be argued either way, which is why we've made it clear in the instructions that here we are looking for 1 and 1 as the first two numbers
+5
Level 59
Aug 22, 2022
In fairness, there technically is no "first" number, as the series can be reversed ad infinitum.
+2
Level 45
Aug 30, 2022
In some definitions, 0 is the 0th number
+1
Level 43
Jan 8, 2023
I dont think zero is in it. If 0 was considered a real number it wouldnt work, cause 0 with previous number would remain zero, so sequence would infinitely be just endless zeros.

1 is the first number, add it with previous number which doesnt exist, making the 2nd number just 1 again.

Now you have 1 with previous number 1 for 2, and so forth.

+1
Level 60
Feb 3, 2023
You end up with endless 0
+2
Level 90
Aug 18, 2022
Says one minute sprint, but my quiz clock started at four minutes and I finished in 1 1/2 minutes.
+2
Level ∞
Aug 18, 2022
Fixed
+2
Level 82
Aug 18, 2022
Timer is greater than 1 minute
+14
Level 87
Aug 18, 2022
How in the world is it possible that 95% got 121393 but only 24% got 2 and only 17% got 5???
+3
Level 86
Aug 18, 2022
Yeah, stats are wacky on this one. The least guessed are the 18th and 25th in sequence, while the huge numbers at the end are all in the 70% guessed. Yet 5 of the first 11 are lower than 50%. Weird.
+2
Level 75
Aug 18, 2022
Curious, I don't know. The stats have settled down somewhat from the numbers reported by db27 and joeythelemur, but they're still looking a bit out of whack (now 77% have got 2, 75% have got 5 and 34% have got 121393. However, I would have thought that the % for each number guessed would reduce steadily as the answer number increases, which hasn't happened here yet). I suspect the stats will iron out further as more quizzers post attempts here.
+2
Level 75
Aug 18, 2022
Percentages as of today with each increasing answer are: 99-80-77-99-75-75-89-75-97-91-71-77-88-80-77-78-66-32-24-42-38-37-36-14-34. I'll have another look in a few days to see if these are smoothing out to something more logical.
+1
Level 75
Aug 22, 2022
Now 100-95-95-98-93-93-95-92-95-93-89-85-78-74-65-60-49-27-15-14-11-9-9-8-4-7. A somewhat smoother decay curve.
+2
Level 75
Aug 25, 2022
All smoothed out now. A check today shows a perfect decay curve of decreasing percentages getting answers right as those answers rise.
+1
Level 66
Aug 18, 2022
I'd also like to mention that most quizzes of this type (sprint) have a relatively smooth bell curve in the "percentage correct" chart on the stats page. This one has very noticeable dips and rises at odd intervals. It was more evident a few hours ago but still... really odd.
+1
Level 57
Aug 22, 2022
The lack of a smooth bell curve is probably because some sums are a lot easier to calculate quickly than others. For example more people got 14 right than 13 but that's probably because the 14th number is 144 + 233, which is quite a simple sum to do in your head as you don't have to carry the 1 anywhere, so unless you get to that sum with a second to spare you'll probably get past that easily. Meanwhile the next sum is 233 + 377 which is easier to mess up (e.g. you might say 600 if you're rushing).
+1
Level 67
Aug 22, 2022
That still seems unlikely as you will need the previous numbers of the sequence to calculate the next ones. For example, you cannot pull 144 and 233 out of nowhere and add them to get the next number without getting 55 or 89. I think it's down to cheating, but this cheating strategy is quite weird. This doesn't really matter as much anymore since it's much smoother now.
+1
Level 60
Aug 22, 2022
I think it's because some people have memorised numbers in the Fibonacci sequence, rather than doing the mental additions. 121393 is quite a memorable number.
+1
Level 63
Aug 22, 2022
That was probably those individuals who programmed this into an Excel spreadsheet and thus got all the numbers right at a snap of their fingers.
+6
Level 87
Aug 20, 2022
.....🧐61.8% of people have 17 correct.

The eventual Fibonacci ratio of one number divided by the next is 0.6180....

+1
Level 53
Aug 22, 2022
I just scored 20/26!
+1
Level 67
Aug 22, 2022
As I learned from the Time/Life book on mathematics more than a half century ago, Fibonacci numbers appear in the pattern of seeds within a sunflower, which follows the Fibonacci sequence. https://www.treehugger.com/nature-blows-my-mind-hypnotic-patterns-sunflowers-4859272.
+2
Level 45
Aug 24, 2022
Spiral out