Medium
Coding & Decoding
Pattern-based coding and decoding reasoning problems.
Coding & Decoding Puzzles
Hard
In a code, every letter is replaced by the letter three positions after it. What is the code for QUIZ? Use alphabet wraparound.
Medium
If A=26, B=25, C=24 and so on until Z=1, what is the value of DOG?
Hard
A word is coded by moving its first letter to the end. How is QUIZ coded?
Expert
In a code, letters in odd positions are shifted one place forward and letters in even positions are shifted one place backward. What is the code for CODE?
Medium
In a certain code, CAT is written as DBU. Using the same rule, how is DOG written?
Hard
In a code, TABLE is written as UBCMF. How is CHAIR written using the same rule?
Medium
If BLUE is coded as 2-12-21-5 using alphabet positions, how is GREEN coded?
Hard
In a code, COMPUTER is written by reversing the word. How is DATABASE written?
Hard
If APPLE is coded as 1-16-16-12-5, what is the code for MANGO using alphabet positions?
Expert
In a code, each letter is shifted two places forward in the alphabet, with X becoming Z, Y becoming A and Z becoming B. How is QUIZ coded?
Medium
If the value of a word is the sum of its alphabet positions, what is the value of CODE?
Hard
If each vowel is replaced by the next vowel in the sequence A-E-I-O-U-A, while consonants remain unchanged, how is QUIZ transformed?
Hard
A code changes each letter to its alphabet position and then adds 1. What is the code for BAD?
Expert
In a certain code, the first letter is moved one position forward, the second two positions forward, the third three positions forward and so on. How is ABCD coded?
Medium
If CAT is coded as DBU and DOG is coded as EPH, how is LION coded using the same rule?
Medium
If APPLE is coded as BQQMF, how is MANGO coded using the same rule?
Hard
In a code, each letter is replaced by the letter three positions ahead in the alphabet, with Z wrapping to C. How is QUIZ coded?
Medium
If BOOK is written as 2-15-15-11 using alphabet positions, how is QUIZ represented?
Hard
In a certain code, each word is reversed and then every letter is shifted one position forward. How is TRAIN coded?
Medium
If PEN is coded as 35 by adding the alphabet positions of its letters, how is BOOK coded?
Hard
A code changes vowels to the next vowel in the cycle A-E-I-O-U-A and consonants to the next consonant in alphabetical order. How is CAT coded?
Hard
If the value of a word is calculated by multiplying the alphabet positions of its first and last letters, what is the value of QUIZ?
Medium
In a code, every letter is replaced by its opposite alphabet letter: A↔Z, B↔Y, C↔X and so on. How is CODE coded?
Hard
A word is coded by adding 1 to the first letter, 2 to the second, 3 to the third and so on. Using alphabet positions with wrapping, how is CODE coded?
Medium
In a certain code, CAT is written as DBU and DOG is written as EPH. How would FISH be written using the same rule?
Hard