Verbal ReasoningYears 4–6Letter Sequences & Codes

Letter-based codes

Decode letter-based ciphers where letters are shifted, swapped, or follow a rule to encode words

What you'll learn

  1. 1

    Imagine you and your friend have a secret code. Each letter of the alphabet has a number — A=1, B=2, C=3, all the way to Z=26!

  2. 2

    What number is the letter C in the code?

  3. 3

    Let's crack the code: 1-2-3 spells A-B-C!

  4. 4

    Use the number line to find what letter 5 is.

  5. 5

    What letter does 5 stand for?

  6. 6

    Crack this code: 8-5-12-16. What word does it make?

  7. 7

    If 12 = L, what letter is 13?

Practise Letter-based codes with Whizlo

Free AI-tutored lessons, unlimited practice questions, and progress tracking for ages 8–11. Aligned to the UK National Curriculum.

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