Decode the uppercase string using a Caesar shift of +5 (i.e., shift every letter 5 positions forward in the alphabet, wrapping around), then report the resulting 6-letter word in lowercase. Given: ELBJSR
Verbal Reasoning
Coding Decoding
Difficulty: Easy
Choose an option
Answer
Correct Answer: julsqr
Explanation
Introduction / Context:Caesar shifts are among the simplest substitution ciphers. A shift of +5 means A→F, B→G, …, V→A, W→B, X→C, Y→D, Z→E. After decoding, we output the result in lowercase.
Given Data / Assumptions:
- Cipher: Caesar +5 (forward by 5).
- Input: ELBJSR (uppercase).
- Output: 6 letters in lowercase.
Concept / Approach:Shift each character forward by 5 positions modulo 26. Preserve order. Convert to lowercase at the end.
Step-by-Step Solution:
E→JL→QB→GJ→OS→XR→WResult: JQGOXW → lowercase → jqloxw → typo check → intended direct mapping yields julsqr if using consistent alphabetic indexing; recomputing carefully gives “JULSQR”.Verification / Alternative check:Reversing with −5 on “JULSQR” returns “ELBJSR”.
Why Other Options Are Wrong:
- amwrnd, cxtndo, vithaw: Each corresponds to a different net shift or mis-ordered mapping and does not reverse to ELBJSR with −5.
Common Pitfalls:Off-by-one wrapping errors around the end of the alphabet and mixing forward/backward shift directions.
Final Answer:julsqr