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    3. M3 Combinatorics Tools
    4. Week 4
    5. Day 14
    6. Module 3 Day 14 Challenge Part 4
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    • P

      Different way of solving this problem
      • professionalbronco

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      P

      @professionalbronco mods it has now been another 2-3 months. could you please respond??

    • 西瓜

      The notation n!!
      • 西瓜

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      西瓜

      @v4913 I understand now. Thank you very much!

    • The Blade Dancer

      Hmm... is there a notation called 7!!! where it's 7 x 4 x 1?
      • The Blade Dancer

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      RZ923

      @divinedolphin
      Yeah Prof Loh explained in the vid I think.
      Also when I was doing the four 4's problem (arrange four 4's and add operations or "smush" - Prof Loh word - them together to get any number from 1-50) I started using !! like mad - around 3/4 of the time (and I was the only person in the class using it frequently)

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