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Coding-Decoding - Beginner Level: number coding BEGINNER

Ready to master coding-decoding? This concept mastery features 20 beginner-level challenges. Worksheet 2 of 30 sharpens your number coding skills. Master number coding, symbol substitution, code breaking through guided practice. Perfect for entry-level test preparation.

📝 Worksheet 2 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner level

What you'll learn in this worksheet:
Your progress through Coding-Decoding
Worksheet 2 of 30 (6% complete)

Question 1

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 2

If 'SOUND' is coded as 'DNUOS', then how is 'FLOOR' coded?
The pattern is reverse coding: SOUND → DNUOS, so FLOOR → ROOLF
reverse, pattern

Question 3

In a certain code, vowels are coded as A=1,E=2,I=3,O=4,U=5. How is 'PLANT' coded?
Vowels: A become numbers: PL1NT
conditional, vowels

Question 4

If the code for 'GREEN' is 'ITGGP' using the rule 'each letter shifted forward by 2', then what is the original word for the code 'ITGGP'?
To decode, shift each letter backward by 2: ITGGP → GREEN
decode, reverse

Question 5

If 'DOG' is coded as 'FQI', then how is 'KEY' coded?
The pattern is shifting each letter by +2. So KEY becomes: K(11→13) → E(5→7) → Y(25→1) = MGA
shift, basic

Question 6

In a certain code, vowels are coded as A=1,E=2,I=3,O=4,U=5. How is 'LOGIC' coded?
Vowels: OI become numbers: L4G3C
conditional, vowels

Question 7

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

Question 8

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

Question 9

If 'BUS' = 42 and 'KEY' = 41, then 'RAT' = ?
Sum of letter positions: BUS = 2+21+19 = 42, KEY = 11+5+25 = 41, RAT = 18+1+20 = 39
position, sum

Question 10

If 'BOX' is coded as 'DQZ', 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 11

If 'HAT' is coded as 'KDW', 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 12

If 'MOON' is coded as 'OQQP', 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 13

If the code for 'BEE' is 'EEB' using the rule 'reverse the word', then what is the original word for the code 'EEB'?
To decode, reverse the word: EEB → BEE
decode, reverse

Question 14

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

Question 15

If 'PENCIL' is coded as 'LICNEP', then how is 'WALL' coded?
The pattern is reverse coding: PENCIL → LICNEP, so WALL → LLAW
reverse, pattern

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 'VERIFICATION' coded?
Vowels shifted forward: VERIFICATION → VFRJFJCBTJPN
conditional, vowels

Question 17

If 'KEY' = 41 and 'CAT' = 24, then 'HAT' = ?
Sum of letter positions: KEY = 11+5+25 = 41, CAT = 3+1+20 = 24, HAT = 8+1+20 = 29
position, sum

Question 18

If 'HAT' = 29 and 'CUP' = 40, then 'DOG' = ?
Sum of letter positions: HAT = 8+1+20 = 29, CUP = 3+21+16 = 40, DOG = 4+15+7 = 26
position, sum

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 'FILE' is coded as 'JMPI' using the rule 'add 4 to each letter's position' (A=1, B=2, ..., Z=26, wrap around), then how is 'WATER' coded?
Each letter position +4: FILE → JMPI
arithmetic, operations
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