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Coding-Decoding - Beginner-Intermediate Level: mixed coding BEGINNER-INTERMEDIATE

Comprehensive race against clock worksheet covering 20 beginner-intermediate-level coding-decoding problems. Worksheet 8 of 30 emphasizes mixed coding. Master letter coding, number coding, symbol substitution through detailed explanations. Difficulty: building on fundamentals with moderate challenges. Tailored for developing preparation.

📝 Worksheet 8 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner-intermediate level

What you'll learn in this worksheet:
Your progress through Coding-Decoding
Worksheet 8 of 30 (26% complete)

Question 1

If A=1, B=2, C=3... Z=26, then 'BRAIN' is coded as?
Converting each letter to its position number: B=2, R=18, A=1, I=9, N=14 → 2181914
numbers, substitution

Question 2

If 'PEN' is coded as 'RGP', then how is 'CAR' coded?
The pattern is shifting each letter by +2. So CAR becomes: C(3→5) → A(1→3) → R(18→20) = ECT
shift, basic

Question 3

If A=1, B=2, C=3... Z=26, then 'TEST' is coded as?
Converting each letter to its position number: T=20, E=5, S=19, T=20 → 2051920
numbers, substitution

Question 4

If 'WORD' is coded as 'ZRUG' using the rule 'shift each letter by +1, then shift again by +2', what is the code?
Step 1: Shift +1 WORD → XPSE, Step 2: Shift +2 → ZRUG
mixed, complex

Question 5

If 'LIGHT' is coded as 'THGIL', then how is 'WINDOW' coded?
The pattern is reverse coding: LIGHT → THGIL, so WINDOW → WODNIW
reverse, pattern

Question 6

In a certain code, each vowel is replaced by the next letter (A→B, E→F, I→J, O→P, U→V). How is 'THETA' coded?
Vowels shifted forward: THETA → THFTB
conditional, vowels

Question 7

In a certain code, vowels are coded as A=1,E=2,I=3,O=4,U=5. How is 'GREEN' coded?
Vowels: EE become numbers: GR22N
conditional, vowels

Question 8

If 'PATTERN' is coded as 'SDWWHUQ' using the rule 'shift each letter by +1, then shift again by +2', what is the code?
Step 1: Shift +1 PATTERN → QBUUFSO, Step 2: Shift +2 → SDWWHUQ
mixed, complex

Question 9

If 'WATER' is coded as 'RETAW', then how is 'WINDOW' coded?
The pattern is reverse coding: WATER → RETAW, so WINDOW → WODNIW
reverse, pattern

Question 10

If 'OPERATING' is coded as 'TMRGZIVKL' using the rule 'replace each letter with its opposite (A↔Z, B↔Y), then reverse', what is the code?
Step 1: Opposite OPERATING → LKVIZGRMT, Step 2: Reverse → TMRGZIVKL
mixed, complex

Question 11

If 'MAP' is coded as 'ZBF' using the rule 'multiply each letter's position by 2' (A=1, B=2, ..., Z=26, wrap around), then how is 'ENCODE' coded?
Each letter position ×2: MAP → ZBF
arithmetic, operations

Question 12

If A=1, B=2, C=3... Z=26, then 'WORLD' is coded as?
Converting each letter to its position number: W=23, O=15, R=18, L=12, D=4 → 231518124
numbers, substitution

Question 13

If the code for 'PATTERN' is 'KZGGVIM' using the rule 'each letter replaced by its opposite (A↔Z, B↔Y)', then what is the original word for the code 'KZGGVIM'?
To decode, apply opposite again: KZGGVIM → PATTERN
decode, reverse

Question 14

If 'PEN' is coded as 'RGP', then how is 'RAT' coded?
The pattern is shifting each letter by +2. So RAT becomes: R(18→20) → A(1→3) → T(20→22) = TCV
shift, basic

Question 15

If 'CAR' is coded as 'FDU', then how is 'PEN' coded?
The pattern is shifting each letter by +3. So PEN becomes: P(16→19) → E(5→8) → N(14→17) = SHQ
shift, basic

Question 16

In a certain code, each vowel is replaced by the next letter (A→B, E→F, I→J, O→P, U→V). How is 'SLOW' coded?
Vowels shifted forward: SLOW → SLPW
conditional, vowels

Question 17

If A=1, B=2, C=3... Z=26, then 'HELLO' is coded as?
Converting each letter to its position number: H=8, E=5, L=12, L=12, O=15 → 85121215
numbers, substitution

Question 18

In a certain code, vowels become next consonant, consonants become next vowel. How is 'HELL' coded?
Swapping vowel/consonant roles: HELL → IFOO
conditional, vowels

Question 19

If 'PEN' is coded as 'NEP', then how is 'ROOM' coded?
The pattern is reverse coding: PEN → NEP, so ROOM → MOOR
reverse, pattern

Question 20

If 'ANSWER' is coded as 'IVDHMZ' using the rule 'reverse the word, then replace each letter with its opposite', what is the code?
Step 1: Reverse ANSWER → REWSNA, Step 2: Opposite → IVDHMZ
mixed, complex
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