ReasoningAbility.com

Coding-Decoding - Beginner Level: letter coding BEGINNER

This foundation builder 🌟 worksheet contains 20 beginner-level coding-decoding problems. Worksheet 1 of 30 focuses on letter coding. Practice letter coding, number coding, symbol substitution with our step-by-step solutions. Difficulty: foundational concepts and basic patterns. Recommended for entry-level learners.

📝 Worksheet 1 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner level

What you'll learn in this worksheet:
Your progress through Coding-Decoding
Worksheet 1 of 30 (3% complete)

Question 1

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

Question 2

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

Question 3

If 'BUS' is coded as 'EXV', 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

Question 4

If 'PIG' is coded as 'MFD' using the rule 'subtract 3 from each letter's position' (A=1, B=2, ..., Z=26, wrap around), then how is 'ANT' coded?
Each letter position -3: PIG → MFD
arithmetic, operations

Question 5

If 'LIP' = 37 and 'CAR' = 22, then 'SUN' = ?
Sum of letter positions: LIP = 12+9+16 = 37, CAR = 3+1+18 = 22, SUN = 19+21+14 = 54
position, sum

Question 6

If 'PLANT' is coded as '63' using the rule 'sum of the positions of all letters', then how is 'WORLD' coded?
Sum of positions: PLANT → 63
arithmetic, operations

Question 7

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

Question 8

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 9

If 'FUNCTION' is coded as '102' using the rule 'sum of the positions of all letters', then how is 'HARDWARE' coded?
Sum of positions: FUNCTION → 102
arithmetic, operations

Question 10

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

Question 11

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

Question 12

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

Question 13

If 'KEY' is coded as 'PJD', then how is 'CAR' coded?
The pattern is shifting each letter by +5. So CAR becomes: C(3→8) → A(1→6) → R(18→23) = HFW
shift, basic

Question 14

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

Question 15

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

Question 16

If 'CHAIR' is coded as 'RIAHC', then how is 'ROOM' coded?
The pattern is reverse coding: CHAIR → RIAHC, so ROOM → MOOR
reverse, pattern

Question 17

If 'RAT' = 39 and 'CAR' = 22, then 'BAG' = ?
Sum of letter positions: RAT = 18+1+20 = 39, CAR = 3+1+18 = 22, BAG = 2+1+7 = 10
position, sum

Question 18

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

Question 19

If the code for 'SECRET' is 'S2CR2T' 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 'S2CR2T'?
To decode, replace numbers back to vowels: S2CR2T → SECRET
decode, reverse

Question 20

If in a code, A↔Z, B↔Y, C↔X, etc. (each letter replaced by its opposite), then 'PATTERN' becomes 'KZGGVIM'. How is 'AUTHORIZE' coded?
Opposite of AUTHORIZE: AUTHORIZE → ZFGSLIRAV
opposite, mirror
Previous Worksheet Next Worksheet