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Coding-Decoding - Beginner-Intermediate Level: decoding techniques BEGINNER-INTERMEDIATE

Quick intensive drill ★ session: 20 beginner-intermediate-level coding-decoding questions. Worksheet 7 of 30 - Focus: decoding techniques. Practice encoding rules, decoding techniques, mixed coding with instant feedback. Great for developing students needing building on fundamentals with moderate challenges practice.

📝 Worksheet 7 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner-intermediate level

What you'll learn in this worksheet:
Your progress through Coding-Decoding
Worksheet 7 of 30 (23% complete)

Question 1

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

Question 2

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

Question 3

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 4

If 'LID' is coded as 'JAL' using the rule 'multiply each letter's position by 3' (A=1, B=2, ..., Z=26, wrap around), then how is 'HAT' coded?
Each letter position ×3: LID → JAL
arithmetic, operations

Question 5

In a certain code, vowels are coded as A=1,E=2,I=3,O=4,U=5. How is 'FIRE' coded?
Vowels: IE become numbers: F3R2
conditional, vowels

Question 6

If 'MUSIC' is coded as 'CISUM', then how is 'DOOR' coded?
The pattern is reverse coding: MUSIC → CISUM, so DOOR → ROOD
reverse, pattern

Question 7

If 'GRASS' is coded as 'EPYQQ' using the rule 'subtract 2 from each letter's position' (A=1, B=2, ..., Z=26, wrap around), then how is 'ENCODE' coded?
Each letter position -2: GRASS → EPYQQ
arithmetic, operations

Question 8

If 'FAN' = 21 and 'CAT' = 24, then 'KEY' = ?
Sum of letter positions: FAN = 6+1+14 = 21, CAT = 3+1+20 = 24, KEY = 11+5+25 = 41
position, sum

Question 9

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

Question 10

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

Question 11

If 'MAP' is coded as 'RFU', then how is 'PEN' coded?
The pattern is shifting each letter by +5. So PEN becomes: P(16→21) → E(5→10) → N(14→19) = UJS
shift, basic

Question 12

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

Question 13

If the code for 'BUS' is 'B5S' using the rule 'vowels replaced by numbers (A=1,E=2,I=3,O=4,U=5)', then what is the original word for the code 'B5S'?
To decode, replace numbers back to vowels: B5S → BUS
decode, reverse

Question 14

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 15

If 'STAR' is coded as 'TUBS', then how is 'BUS' coded?
The pattern is shifting each letter by +1. So BUS becomes: B(2→3) → U(21→22) → S(19→20) = CVT
shift, basic

Question 16

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

Question 17

If 'BAG' is coded as 'GAB', then how is 'CEILING' coded?
The pattern is reverse coding: BAG → GAB, so CEILING → GNILIEC
reverse, pattern

Question 18

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

Question 19

If 'SUN' is coded as 'WYR', then how is 'BOX' coded?
The pattern is shifting each letter by +4. So BOX becomes: B(2→6) → O(15→19) → X(24→2) = FSB
shift, basic

Question 20

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