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Coding-Decoding - Beginner Level: cipher solving BEGINNER

Boost your speed and accuracy with this beginner friendly 📈 worksheet. Worksheet 5 of 30 presents 20 beginner-level coding-decoding problems. Focus on cipher solving while practicing pattern decoding, cipher solving, encoding rules. Difficulty: foundational concepts and basic patterns. Perfect for entry-level test takers.

📝 Worksheet 5 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner level

What you'll learn in this worksheet:
Your progress through Coding-Decoding
Worksheet 5 of 30 (16% complete)

Question 1

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

Question 2

If A=1, B=2, C=3... Z=26, then 'PYTHON' is coded as?
Converting each letter to its position number: P=16, Y=25, T=20, H=8, O=15, N=14 → 16252081514
numbers, substitution

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 'BETA' coded?
Vowels shifted forward: BETA → BFTB
conditional, vowels

Question 4

If A=1, B=2, C=3... Z=26, then 'CODE' is coded as?
Converting each letter to its position number: C=3, O=15, D=4, E=5 → 31545
numbers, substitution

Question 5

If 'RAT' is coded as 'SBU', then how is 'CAR' coded?
The pattern is shifting each letter by +1. So CAR becomes: C(3→4) → A(1→2) → R(18→19) = DBS
shift, basic

Question 6

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

Question 7

If 'FAN' = 21 and 'KEY' = 41, then 'BUS' = ?
Sum of letter positions: FAN = 6+1+14 = 21, KEY = 11+5+25 = 41, BUS = 2+21+19 = 42
position, sum

Question 8

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

Question 9

If 'RAT' = 39 and 'BUS' = 42, then 'SUN' = ?
Sum of letter positions: RAT = 18+1+20 = 39, BUS = 2+21+19 = 42, SUN = 19+21+14 = 54
position, sum

Question 10

If the code for 'REVIEW' is 'WJANJB' using the rule 'each letter shifted forward by 5', then what is the original word for the code 'WJANJB'?
To decode, shift each letter backward by 5: WJANJB → REVIEW
decode, reverse

Question 11

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

Question 12

If 'LIP' = 37 and 'RAT' = 39, then 'CUP' = ?
Sum of letter positions: LIP = 12+9+16 = 37, RAT = 18+1+20 = 39, CUP = 3+21+16 = 40
position, sum

Question 13

In a certain code, vowels are coded as A=1,E=2,I=3,O=4,U=5. How is 'HELLO' coded?
Vowels: EO become numbers: H2LL4
conditional, vowels

Question 14

If 'MOON' is coded as 'PRRQ', then how is 'CAR' coded?
The pattern is shifting each letter by +3. So CAR becomes: C(3→6) → A(1→4) → R(18→21) = FDU
shift, basic

Question 15

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

Question 16

If A=1, B=2, C=3... Z=26, then 'PYTHON' is coded as?
Converting each letter to its position number: P=16, Y=25, T=20, H=8, O=15, N=14 → 16252081514
numbers, substitution

Question 17

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

Question 18

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

Question 19

If 'MAP' is coded as 'PDS', then how is 'BUS' coded?
The pattern is shifting each letter by +3. So BUS becomes: B(2→5) → U(21→24) → S(19→22) = EXV
shift, basic

Question 20

If 'LIP' is coded as 'OLS', then how is 'MAP' coded?
The pattern is shifting each letter by +3. So MAP becomes: M(13→16) → A(1→4) → P(16→19) = PDS
shift, basic
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