Combination Lock

Cerebral distractions of every kind, mostly but not exclusively Countdown-related.

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Adam Dexter
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Combination Lock

Post by Adam Dexter » Wed Nov 11, 2020 4:16 pm

I finally got round to doing the Combination Lock puzzles on the back of Co:Leeds 2016 programme.

I have no solutions for "Hard" and 4 solutions for the "Crazy".

Would appreciate if you could have a look and see if you concur:

(Both puzzles concern a 4 reel padlock with digits 0-9, the object being to solve the code)

HARD
  • Reel C times Reel A equals Reel B times Reel D
    The First reel and reel B are the same number
    The First reel plus reel C is 2 more than Reel B plus the last reel
    The digits total 14
CRAZY
  • The answer is divisible by 5
    The first reel plus the last reel equals reel B
    Reel D plus reel B is 4 more than Reel C plus Reel A


    I have worked them out using Excel and filtered, but it seems the "Hard" one is impossible.
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Jon O'Neill
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Re: Combination Lock

Post by Jon O'Neill » Wed Nov 11, 2020 4:26 pm

Is Reel A the first reel?

Thomas Cappleman
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Re: Combination Lock

Post by Thomas Cappleman » Wed Nov 11, 2020 4:30 pm

If so, 0086 works for Hard.

Fiona T
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Re: Combination Lock

Post by Fiona T » Wed Nov 11, 2020 4:32 pm

Assuming 1st is A, does 0086 work?
8-) <-2m-> 8-)

Fiona T
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Re: Combination Lock

Post by Fiona T » Wed Nov 11, 2020 4:33 pm

Type faster Fiona
8-) <-2m-> 8-)

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Adam Dexter
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Re: Combination Lock

Post by Adam Dexter » Wed Nov 11, 2020 5:00 pm

Ahh silly me started with 1000 as the first combo as Excel kept removing my leading zeroes... Yes 0086 works and Reel A is the first reel.

As for the Crazy one?
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Thomas Cappleman
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Re: Combination Lock

Post by Thomas Cappleman » Wed Nov 11, 2020 5:04 pm

I get 5 solutions to Crazy (probably your 4 plus the one before 1000), any of [0-4][5-9]65

Gavin Chipper
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Re: Combination Lock

Post by Gavin Chipper » Wed Nov 11, 2020 5:25 pm

Jon O'Neill wrote:
Wed Nov 11, 2020 4:26 pm
Is Reel A the first reel?
Yes, but surprisingly Reel B is the last reel.

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Adam Dexter
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Re: Combination Lock

Post by Adam Dexter » Wed Nov 11, 2020 5:33 pm

Thomas Cappleman wrote:
Wed Nov 11, 2020 5:04 pm
I get 5 solutions to Crazy (probably your 4 plus the one before 1000), any of [0-4][5-9]65
Thanks :) Yes mine too end in 65. Glad it's not just me. Anyone got Excel skills to keep the leading zeroes?
ADAM DEXTER: MAXED DATER
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Adam Dexter
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Re: Combination Lock

Post by Adam Dexter » Wed Nov 11, 2020 5:36 pm

Got it - just need to set as text rather than number :)

0565 your other one?
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Callum Todd
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Re: Combination Lock

Post by Callum Todd » Wed Nov 11, 2020 7:49 pm

These puzzles were lifted from this website.

They refer to reels as 'the first reel' and 'reel A' (and so on) interchangeably.

Many of the puzzles can have multiple solutions.
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