Visiting Nana is always interesting – except for last weekend. She was busy mending some rather large item of clothing, and she said to me "Now then, you choose: You can do the washing up (there was quite a lot), OR you can go into my black elastic drawer - and fetch me the second largest loop of elastic there is! I know it's a bit of a tangle, but I'm sure a bright young mind like you can find it with no difficulty.

Fool that I am I chose the elastic. What a tedious chore! Next time I will volunteer to do the washing up instead.

draw filled with black elastic


1 Answer 1


Nothing complicated, just loop-following: There is one main loop coloured fuchsia above, and its removal leaves several non-entangled smaller loops. The second-longest loop is in red. Very short loops have been whited out.

  • $\begingroup$ Nana is so happy that she can now get on with her mending! $\endgroup$
    – Konchog
    Commented Nov 20, 2022 at 0:50
  • $\begingroup$ How did you colour them like this? $\endgroup$
    – ACB
    Commented Nov 20, 2022 at 3:39
  • 3
    $\begingroup$ @ACB Bucket fill in GIMP. Tons of clicking. $\endgroup$ Commented Nov 20, 2022 at 3:40

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