Skip to main content

Number codes: 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.

Back to “Number codes”

Download PDFA4Letter

The PDF downloads include the answer key on a separate page.

Tip: in the print dialog, turn off “Headers and footers”.

Print options

Adds the teacher's page with the solutions.

Bigger text, in one column.

Still preparing. Print again in a moment.

Worksheet · Number codes

Number codes: worksheet

NameDate

How it works

Swap each letter for its number from the table. To decode, swap each number back.

Key

Number codes
LetterABCDEFGHIJKLMNOPQRSTUVWXYZ
Becomes1234567891011121314151617181920212223242526

Exercises

  1. Decode this message.

    20 8 5 / 20 18 5 1 19 21 18 5 / 9 19 / 21 14 4 5 18 / 20 8 5 / 19 20 1 9 18 19

    Your answer

  2. Encode this message.

    WE ESCAPED JUST IN TIME

    Your answer

escapify.io