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

This deep dive ★ worksheet contains 20 beginner-intermediate-level coding-decoding problems. Worksheet 11 of 30 focuses on binary coding. Practice code breaking, pattern decoding, cipher solving with our step-by-step solutions. Difficulty: building on fundamentals with moderate challenges. Recommended for developing learners.

📝 Worksheet 11 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner-intermediate level

What you'll learn in this worksheet:
Your progress through Coding-Decoding
Worksheet 11 of 30 (36% complete)

Question 1

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

Question 2

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

Question 3

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

Question 4

In a certain code, vowels are coded as A=1,E=2,I=3,O=4,U=5. How is 'LIGHT' coded?
Vowels: I become numbers: L3GHT
conditional, vowels

Question 5

If 'SUN' = 54 and 'BUS' = 42, then 'LIP' = ?
Sum of letter positions: SUN = 19+21+14 = 54, BUS = 2+21+19 = 42, LIP = 12+9+16 = 37
position, sum

Question 6

If 'CUP' = 40 and 'DOG' = 26, then 'RAT' = ?
Sum of letter positions: CUP = 3+21+16 = 40, DOG = 4+15+7 = 26, RAT = 18+1+20 = 39
position, sum

Question 7

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

Question 8

If 'FAN' = 21 and 'CUP' = 40, then 'KEY' = ?
Sum of letter positions: FAN = 6+1+14 = 21, CUP = 3+21+16 = 40, KEY = 11+5+25 = 41
position, sum

Question 9

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

Question 10

If 'BETA' is coded as 'EHWD' using the rule 'add 3 to each letter's position' (A=1, B=2, ..., Z=26, wrap around), then how is 'MYSTERY' coded?
Each letter position +3: BETA → EHWD
arithmetic, operations

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

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

Question 13

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

Question 14

If A=1, B=2, C=3... Z=26, then 'EXAM' is coded as?
Converting each letter to its position number: E=5, X=24, A=1, M=13 → 524113
numbers, substitution

Question 15

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

Question 16

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

Question 17

If 'SUN' = 54 and 'PEN' = 35, then 'BUS' = ?
Sum of letter positions: SUN = 19+21+14 = 54, PEN = 16+5+14 = 35, BUS = 2+21+19 = 42
position, sum

Question 18

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 19

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 20

If 'PROCESSOR' is coded as 'UWTHJXXTW' using the rule 'add 5 to each letter's position' (A=1, B=2, ..., Z=26, wrap around), then how is 'CUBE' coded?
Each letter position +5: PROCESSOR → UWTHJXXTW
arithmetic, operations
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