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Polybius square: worksheet

Print this worksheet for your students: it has the key, a message to decode and one to encode. Add the answer key for yourself.

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Worksheet · Polybius square

Polybius square: worksheet

NameDate

How it works

Write each letter's row, then its column: A is 11. A slash separates words. To decode, read the digits in pairs.

Key

Polybius square
12345
1ABCDE
2FGHI/JK
3LMNOP
4QRSTU
5VWXYZ

Exercises

  1. Decode this message.

    44 23 15 / 44 42 15 11 43 45 42 15 / 24 43 / 45 33 14 15 42 / 44 23 15 / 43 44 11 24 42 43

    Your answer

  2. Encode this message.

    WE ESCAPED IUST IN TIME

    Your answer

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