1. 16
    1. 1

      TBH counting has been a great difficulty for me whether it is 0 or even 1.

      c)      2 ≤ i ≤ 12
      

      would pretty much force me to use fingers.

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        That’s actually the easiest: (upper - lower) + 1. In your example: (12 - 2) + 1 = 11.

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          Yup. Off by one errors have a way of screwing your head I guess :)