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Grade 4 Secret Codes Worksheet with Answers

Grade 4 (US) · Year 5 (UK) · Class 4 (India) · English

Unit 7: Going FurtherWord PuzzlesChallenge

Cracking and writing secret messages with number codes and letter-shift ciphers. This free upper elementary worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Secret Codes

Grade 4 · English

Score___ / 12

Name

Class

Date

Learning goal: Word Puzzles

Directions: Use the words in the word bank to help you. Use the diagram to help you.

Word bank

cattreerainmusicshipduckkitesunmoontigerlion

Word bank

cattreerainmusicshipduckkitesunmoontigerlion
  1. 1

    Each letter of a secret word was moved 1 letter forward in the alphabet (A → B). Decode: EVDL

    ABBCCDDEEFFGGHHIIJJKKLLMMNNOOPPQQRRSSTTUUVVWWXXYYZZACode: EVDL
  2. 2

    Use the code A = 1, B = 2, C = 3 … Z = 26. Decode the secret word: 19-8-9-16

    A1B2C3D4E5F6G7H8I9J10K11L12M13N14O15P16Q17R18S19T20U21V22W23X24Y25Z26Code: 19-8-9-16
  3. 3

    Each letter of a secret word was moved 2 letters forward in the alphabet (A → C). Decode: VKIGT

    ACBDCEDFEGFHGIHJIKJLKMLNMONPOQPRQSRTSUTVUWVXWYXZYAZBCode: VKIGT
  4. 4

    Each letter of a secret word was moved 1 letter forward in the alphabet (A → B). Decode: NPPO

    ABBCCDDEEFFGGHHIIJJKKLLMMNNOOPPQQRRSSTTUUVVWWXXYYZZACode: NPPO
  5. 5

    Use the code A = 1, B = 2, C = 3 … Z = 26. Decode the secret word: 11-9-20-5

    A1B2C3D4E5F6G7H8I9J10K11L12M13N14O15P16Q17R18S19T20U21V22W23X24Y25Z26Code: 11-9-20-5
  6. 6

    Each letter of a secret word was moved 1 letter forward in the alphabet (A → B). Decode: DBU

    ABBCCDDEEFFGGHHIIJJKKLLMMNNOOPPQQRRSSTTUUVVWWXXYYZZACode: DBU
  7. 7

    Use the code A = 1, B = 2, C = 3 … Z = 26. Decode the secret word: 20-18-5-5

    A1B2C3D4E5F6G7H8I9J10K11L12M13N14O15P16Q17R18S19T20U21V22W23X24Y25Z26Code: 20-18-5-5
  8. 8

    Use the code A = 1, B = 2, C = 3 … Z = 26. Decode the secret word: 19-21-14

    A1B2C3D4E5F6G7H8I9J10K11L12M13N14O15P16Q17R18S19T20U21V22W23X24Y25Z26Code: 19-21-14
  9. 9

    Each letter of a secret word was moved 1 letter forward in the alphabet (A → B). Decode: TIJQ

    ABBCCDDEEFFGGHHIIJJKKLLMMNNOOPPQQRRSSTTUUVVWWXXYYZZACode: TIJQ
  10. 10

    Each letter of a secret word was moved 2 letters forward in the alphabet (A → C). Decode: OWUKE

    ACBDCEDFEGFHGIHJIKJLKMLNMONPOQPRQSRTSUTVUWVXWYXZYAZBCode: OWUKE
  11. 11

    Use the code A = 1, B = 2, C = 3 … Z = 26. Decode the secret word: 12-9-15-14

    A1B2C3D4E5F6G7H8I9J10K11L12M13N14O15P16Q17R18S19T20U21V22W23X24Y25Z26Code: 12-9-15-14
  12. 12

    Each letter of a secret word was moved 1 letter forward in the alphabet (A → B). Decode: SBJO

    ABBCCDDEEFFGGHHIIJJKKLLMMNNOOPPQQRRSSTTUUVVWWXXYYZZACode: SBJO

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Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/english/4/secret_codes

Answer key (click to show)
  1. 1.duck
  2. 2.ship
  3. 3.tiger
  4. 4.moon
  5. 5.kite
  6. 6.cat
  7. 7.tree
  8. 8.sun
  9. 9.ship
  10. 10.music
  11. 11.lion
  12. 12.rain

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