Ep.22: Cryptarithms

Cryptarithms are a puzzle where the digits are replaced by letters or symbols. When the numbers are replaced by letters of the alphabet and it spells something readable, it’s called Alphametics.

Download the student worksheet that goes with this lesson.

Rules: Each letter represents a unique digit, numbers may not start with zero, and the solution is unique. A few weird things to remember are: stars substitute for any digit, and are not related to each other, dots stand for a decimal point, and lower case ‘x’ means multiplication.

2 Responses to “Ep.22: Cryptarithms”


  1. SM

    Hi Aurora,

    The video you posted on cryptarythms was – WOW! I need to dust those cobwebs off my brain. Would you be willing to post the answers? I know my children will find this challenging and fun!

  2. Aurora Lipper

    Aww.. thanks so much! I really hope you enjoy them – they really are a favorite of mine. The ones I gave are pretty well known, so here’s a couple of websites that have answers to those and even more of them:

    http://cryptarithms.awardspace.us/
    http://www.cut-the-knot.org/cryptarithms/st_crypto.shtml

    Happy experimenting!
    Aurora

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