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Coding-Decoding - Advanced Level: binary coding ADVANCED

Master coding-decoding concepts through this hard problem set practice set. Worksheet 26 of 30 contains 20 advanced-level problems. Deep dive into binary coding while learning pattern decoding, cipher solving, encoding rules. Recommended for advanced learners aiming for complex scenarios and multi-step problems.

📝 Worksheet 26 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Advanced level

What you'll learn in this worksheet:
Your progress through Coding-Decoding
Worksheet 26 of 30 (86% complete)

Question 1

If A=1, B=2, C=3... Z=26, then 'WORLD' is coded as?
Converting each letter to its position number: W=23, O=15, R=18, L=12, D=4 → 231518124
numbers, substitution

Question 2

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

Question 3

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

Question 4

In a certain code, vowels are coded as A=1,E=2,I=3,O=4,U=5. How is 'COMPUTER' coded?
Vowels: OUE become numbers: C4MP5T2R
conditional, vowels

Question 5

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

Question 6

If 'BUS' = 42 and 'PEN' = 35, then 'LIP' = ?
Sum of letter positions: BUS = 2+21+19 = 42, PEN = 16+5+14 = 35, LIP = 12+9+16 = 37
position, sum

Question 7

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

Question 8

If 'BOX' is coded as 'GTC', then how is 'KEY' coded?
The pattern is shifting each letter by +5. So KEY becomes: K(11→16) → E(5→10) → Y(25→4) = PJD
shift, basic

Question 9

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

Question 10

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

Question 11

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

Question 12

If A=1, B=2, C=3... Z=26, then 'WORLD' is coded as?
Converting each letter to its position number: W=23, O=15, R=18, L=12, D=4 → 231518124
numbers, substitution

Question 13

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

Question 14

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

Question 15

In a certain code, vowels are coded as A=1,E=2,I=3,O=4,U=5. How is 'FIRE' coded?
Vowels: IE become numbers: F3R2
conditional, vowels

Question 16

If 'WORLD' is coded as '72' using the rule 'sum of the positions of all letters', then how is 'STORAGE' coded?
Sum of positions: WORLD → 72
arithmetic, operations

Question 17

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

Question 18

If the code for 'BLUE' is 'GQZJ' using the rule 'each letter shifted forward by 5', then what is the original word for the code 'GQZJ'?
To decode, shift each letter backward by 5: GQZJ → BLUE
decode, reverse

Question 19

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

Question 20

If 'BUS' = 42 and 'HAT' = 29, then 'CAT' = ?
Sum of letter positions: BUS = 2+21+19 = 42, HAT = 8+1+20 = 29, CAT = 3+1+20 = 24
position, sum
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