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Keycode (Posted on 2007-09-06) Difficulty: 2 of 5
Every day when Frank goes to work, he needs to enter a keycode with six different digits to get into the building. The front door has one keypad style and the back door has a different keypad style. One day, Frank realized that each digit in his keycode was horizontally, vertically or diagonally adjacent to the next digit on both keypads.

If the first digit of Frank's keycode is larger than the last, can you determine his keycode?

    Front               Back
+---+---+---+   +---+---+---+---+---+
| 1 | 2 | 3 |   | 1 | 2 | 3 | 4 | 5 |
+---+---+---+   +---+---+---+---+---+
| 4 | 5 | 6 |   | 6 | 7 | 8 | 9 | 0 |
+---+---+---+   +---+---+---+---+---+
| 7 | 8 | 9 |
+---+---+---+
    | 0 |
    +---+
Example: 2,6 is a possible part of the keycode but 3,6 and 1,6 are not since those are adjacent on only one keypad.

See The Solution Submitted by Brian Smith    
Rating: 3.6250 (8 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
got itRaymond2007-09-29 16:31:30
Keycodemark adams2007-09-17 15:51:26
solutionelisha2007-09-12 17:24:01
SolutionFull Solution with explanationLisa2007-09-11 05:51:42
Some Thoughtsre: SolutionK Sengupta2007-09-07 09:40:40
re(3): Solution -- mis read?brianjn2007-09-07 09:07:05
re(2): Solution -- mis read?Charlie2007-09-07 08:50:56
re: Solution -- mis read?brianjn2007-09-07 05:53:18
SolutionSolutionK Sengupta2007-09-07 01:17:29
SolutionSolutionPraneeth2007-09-07 00:48:39
re(3): Solution foundJosie Faulkner2007-09-06 19:59:29
re(2): Solution foundFernando2007-09-06 12:36:44
Solutionre: Solution foundCharlie2007-09-06 12:01:23
Solution foundKeith2007-09-06 10:49:48
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