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Coding-Decoding - Beginner Level: pattern decoding BEGINNER

Level up your coding-decoding skills with this entry level practice. 20 beginner-level problems await in Worksheet 4 of 30. Focus area: pattern decoding. Learn code breaking, pattern decoding, cipher solving through systematic practice. Designed for entry-level learners seeking foundational concepts and basic patterns.

📝 Worksheet 4 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner level

What you'll learn in this worksheet:
Your progress through Coding-Decoding
Worksheet 4 of 30 (13% complete)

Question 1

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

Question 2

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

Question 3

In a certain code, vowels become next consonant, consonants become next vowel. How is 'ALPHA' coded?
Swapping vowel/consonant roles: ALPHA → BOUIB
conditional, vowels

Question 4

If 'SUN' = 54 and 'RAT' = 39, then 'BOX' = ?
Sum of letter positions: SUN = 19+21+14 = 54, RAT = 18+1+20 = 39, BOX = 2+15+24 = 41
position, sum

Question 5

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

Question 6

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

Question 7

If 'CAT' = 24 and 'BUS' = 42, then 'PEN' = ?
Sum of letter positions: CAT = 3+1+20 = 24, BUS = 2+21+19 = 42, PEN = 16+5+14 = 35
position, sum

Question 8

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

Question 9

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

Question 10

If A=1, B=2, C=3... Z=26, then 'BRAIN' is coded as?
Converting each letter to its position number: B=2, R=18, A=1, I=9, N=14 → 2181914
numbers, substitution

Question 11

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 12

If 'SUN' = 54 and 'LIP' = 37, then 'PEN' = ?
Sum of letter positions: SUN = 19+21+14 = 54, LIP = 12+9+16 = 37, PEN = 16+5+14 = 35
position, sum

Question 13

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

Question 14

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

Question 15

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

Question 16

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

Question 17

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

Question 18

If 'HAT' is coded as 'KDW', then how is 'LIP' coded?
The pattern is shifting each letter by +3. So LIP becomes: L(12→15) → I(9→12) → P(16→19) = OLS
shift, basic

Question 19

If 'MAP' = 30 and 'RAT' = 39, then 'LIP' = ?
Sum of letter positions: MAP = 13+1+16 = 30, RAT = 18+1+20 = 39, LIP = 12+9+16 = 37
position, sum

Question 20

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