Can you crack the combination lock?
Duration: 2 mins 53 secs
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About this item
| Description: |
The sequence 11221 contains all 2-digit combinations using the numbers 1 and 2.
Can you find a sequence that contains all the 3-digit combinations using the numbers 1, 2, and 3. What is the shortest such sequence? Can you find a sequence that contains all the 4-digit combinations using the numbers 1, 2, 3, and 4. What is the shortest such sequence? Then, can you break this lock? By which I mean, find the shortest sequence containing all 4-digit combinations using the numbers 0 to 9. The sequence is 10003 digits long (yes I misspoke in the video!) |
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| Created: | 2011-12-16 01:53 |
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| Collection: | Quite Easily Done |
| Publisher: | University of Cambridge |
| Copyright: | Dr J.R. Grime |
| Language: | eng (English) |
| Distribution: |
World
(downloadable)
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| Keywords: | maths; math; mathematics; problem; puzzle; combination; lock; break; crack; sequence; combinatorics; |
| Categories: |
iTunes - Mathematics |
| Explicit content: | No |
| Aspect Ratio: | 16:9 |
| Screencast: | No |
| Bumper: | UCS Default |
| Trailer: | UCS Default |
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| MPEG-4 Video | 640x360 | 1.78 Mbits/sec | 38.57 MB | View | Download | |
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| MP3 | 44100 Hz | 125.59 kbits/sec | 2.45 MB | Listen | Download | |
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