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Nabu's Knee-knocker SignHint



  • Kid must have a 2 in the ones place, because

    Start with 20 on the calculator and press and so on.

    Do any numbers you see have 2 in the ones place? Is there a pattern?


  • Mid is between 5 and 109.
    Mid has a 4 or a 9 in the ones place, because
    Start with 5 on the calculator and press and so on.

    Do any numbers you see have 4 or 9 in the ones place? Is there a pattern?


  • .

    Check which numbers Lid could be by adding 4s to 13, 18, 23, and 28. You don't need to add 4s to 33, 38, 43, and so on, because such numbers will be repeats of those you get adding 4s to 13, 18, 23, and 28.


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