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Coding-Decoding - Beginner Level: encoding rules BEGINNER

Master coding-decoding concepts through this speed drill practice set. Worksheet 6 of 30 contains 20 beginner-level problems. Deep dive into encoding rules while learning cipher solving, encoding rules, decoding techniques. Recommended for entry-level learners aiming for foundational concepts and basic patterns.

📝 Worksheet 6 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Beginner level

What you'll learn in this worksheet:
Your progress through Coding-Decoding
Worksheet 6 of 30 (20% complete)

Question 1

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 2

If 'BOX' = 41 and 'FAN' = 21, then 'HAT' = ?
Sum of letter positions: BOX = 2+15+24 = 41, FAN = 6+1+14 = 21, HAT = 8+1+20 = 29
position, sum

Question 3

If 'LIP' = 37 and 'BAG' = 10, then 'PEN' = ?
Sum of letter positions: LIP = 12+9+16 = 37, BAG = 2+1+7 = 10, PEN = 16+5+14 = 35
position, sum

Question 4

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

Question 5

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 6

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

Question 7

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

Question 8

If 'MAP' = 30 and 'KEY' = 41, then 'BUS' = ?
Sum of letter positions: MAP = 13+1+16 = 30, KEY = 11+5+25 = 41, BUS = 2+21+19 = 42
position, sum

Question 9

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

Question 10

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

Question 11

If 'CUP' = 40 and 'RAT' = 39, then 'BUS' = ?
Sum of letter positions: CUP = 3+21+16 = 40, RAT = 18+1+20 = 39, BUS = 2+21+19 = 42
position, sum

Question 12

If 'LIP' is coded as 'NKR', then how is 'MOON' coded?
The pattern is shifting each letter by +2. So MOON becomes: M(13→15) → O(15→17) → O(15→17) → N(14→16) = OQQP
shift, basic

Question 13

If the code for 'STUDY' is 'ST5DY' 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 'ST5DY'?
To decode, replace numbers back to vowels: ST5DY → STUDY
decode, reverse

Question 14

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 15

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

Question 16

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

Question 17

If 'PEN' is coded as 'QFO', then how is 'MAP' coded?
The pattern is shifting each letter by +1. So MAP becomes: M(13→14) → A(1→2) → P(16→17) = NBQ
shift, basic

Question 18

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

Question 19

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

Question 20

If 'MUSIC' is coded as 'CISUM', then how is 'DOOR' coded?
The pattern is reverse coding: MUSIC → CISUM, so DOOR → ROOD
reverse, pattern
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