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

Intensive quick response training 🎯 drill: 20 beginner-intermediate-level coding-decoding questions. Worksheet 10 of 30 hones your matrix coding abilities. Practice symbol substitution, code breaking, pattern decoding under timed conditions. Best for developing students seeking building on fundamentals with moderate challenges.

📝 Worksheet 10 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner-intermediate level

What you'll learn in this worksheet:
Your progress through Coding-Decoding
Worksheet 10 of 30 (33% complete)

Question 1

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

Question 2

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

Question 3

If 'SUN' = 54 and 'CAR' = 22, then 'BAG' = ?
Sum of letter positions: SUN = 19+21+14 = 54, CAR = 3+1+18 = 22, BAG = 2+1+7 = 10
position, sum

Question 4

If 'STAR' is coded as 'UVCT', then how is 'HAT' coded?
The pattern is shifting each letter by +2. So HAT becomes: H(8→10) → A(1→3) → T(20→22) = JCV
shift, basic

Question 5

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

Question 6

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

Question 7

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

Question 8

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

Question 9

If 'BAT' is coded as 'FEX', then how is 'MAP' coded?
The pattern is shifting each letter by +4. So MAP becomes: M(13→17) → A(1→5) → P(16→20) = QET
shift, basic

Question 10

If 'KEY' is coded as 'NHB', 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 11

If 'TEST' is coded as 'GHVG' using the rule 'reverse the word, then replace each letter with its opposite', what is the code?
Step 1: Reverse TEST → TSET, Step 2: Opposite → GHVG
mixed, complex

Question 12

If 'PEN' is coded as 'TIR', then how is 'HAT' coded?
The pattern is shifting each letter by +4. So HAT becomes: H(8→12) → A(1→5) → T(20→24) = LEX
shift, basic

Question 13

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

Question 14

In a certain code, vowels are coded as A=1,E=2,I=3,O=4,U=5. How is 'MYSTERY' coded?
Vowels: E become numbers: MYST2RY
conditional, vowels

Question 15

If the code for 'DATABASE' is 'D1T1B1S2' 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 'D1T1B1S2'?
To decode, replace numbers back to vowels: D1T1B1S2 → DATABASE
decode, reverse

Question 16

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 17

If the code for 'JAR' is 'J1R' 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 'J1R'?
To decode, replace numbers back to vowels: J1R → JAR
decode, reverse

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 the code for 'LETTER' is 'L2TT2R' 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 'L2TT2R'?
To decode, replace numbers back to vowels: L2TT2R → LETTER
decode, reverse

Question 20

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