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Coding-Decoding - Intermediate-Advanced Level: pattern decoding INTERMEDIATE-ADVANCED

Strategic expert challenge ★ for coding-decoding: 20 intermediate-advanced-level problems. Worksheet 19 of 30 - Focus: pattern decoding. Develop expertise in pattern decoding, cipher solving, encoding rules with step-by-step solutions. Ideal for advanced developing learners targeting advanced concepts with increasing complexity.

📝 Worksheet 19 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Intermediate-advanced level

What you'll learn in this worksheet:
Your progress through Coding-Decoding
Worksheet 19 of 30 (63% complete)

Question 1

If 'FLY' is coded as 'HNA' using the rule 'add 2 to each letter's position' (A=1, B=2, ..., Z=26, wrap around), then how is 'APPLICATION' coded?
Each letter position +2: FLY → HNA
arithmetic, operations

Question 2

If 'CAT' = 24 and 'BOX' = 41, then 'CAR' = ?
Sum of letter positions: CAT = 3+1+20 = 24, BOX = 2+15+24 = 41, CAR = 3+1+18 = 22
position, sum

Question 3

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

Question 4

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

Question 5

In a certain code, each consonant is replaced by the previous letter (B→A, C→B, etc.). How is 'COUNT' coded?
Consonants shifted backward: COUNT → BOUMS
conditional, vowels

Question 6

If 'BETA' is coded as 'CVGD' using the rule 'reverse the word, then shift each letter by +2', what is the code?
Step 1: Reverse BETA → ATEB, Step 2: Shift +2 → CVGD
mixed, complex

Question 7

If 'CAR' is coded as 'GEV', then how is 'SUN' coded?
The pattern is shifting each letter by +4. So SUN becomes: S(19→23) → U(21→25) → N(14→18) = WYR
shift, basic

Question 8

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

Question 9

If A=1, B=2, C=3... Z=26, then 'LOGIC' is coded as?
Converting each letter to its position number: L=12, O=15, G=7, I=9, C=3 → 1215793
numbers, substitution

Question 10

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 11

If A=1, B=2, C=3... Z=26, then 'LOGIC' is coded as?
Converting each letter to its position number: L=12, O=15, G=7, I=9, C=3 → 1215793
numbers, substitution

Question 12

In a certain code, each consonant is replaced by the previous letter (B→A, C→B, etc.). How is 'PROCESSOR' coded?
Consonants shifted backward: PROCESSOR → OQOBERROQ
conditional, vowels

Question 13

If in a code, A↔Z, B↔Y, C↔X, etc. (each letter replaced by its opposite), then 'DISK' becomes 'WRHP'. How is 'BINARY' coded?
Opposite of BINARY: BINARY → YRMZIB
opposite, mirror

Question 14

If the code for 'RUBY' is 'UXEB' using the rule 'each letter shifted forward by 3', then what is the original word for the code 'UXEB'?
To decode, shift each letter backward by 3: UXEB → RUBY
decode, reverse

Question 15

If in a code, A↔Z, B↔Y, C↔X, etc. (each letter replaced by its opposite), then 'DECODE' becomes 'WVXLWV'. How is 'SLOW' coded?
Opposite of SLOW: SLOW → HOLD
opposite, mirror

Question 16

If 'PUZZLED' is coded as 'FGNBBWR' using the rule 'reverse the word, then shift each letter by +2', what is the code?
Step 1: Reverse PUZZLED → DELZZUP, Step 2: Shift +2 → FGNBBWR
mixed, complex

Question 17

If 'STAR' is coded as 'TUBS', then how is 'BOX' coded?
The pattern is shifting each letter by +1. So BOX becomes: B(2→3) → O(15→16) → X(24→25) = CPY
shift, basic

Question 18

If 'STAR' is coded as 'UVCT', then how is 'BAT' coded?
The pattern is shifting each letter by +2. So BAT becomes: B(2→4) → A(1→3) → T(20→22) = DCV
shift, basic

Question 19

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

Question 20

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