Decode the uppercase string using a Caesar shift of −6, then output in lowercase. Given: XDMJRA
Verbal Reasoning
Coding Decoding
Difficulty: Easy
Choose an option
Answer
Correct Answer: algpkj
Explanation
Introduction / Context:Uniform backward Caesar shifts decode each character by a fixed amount. Here we use −6.
Given Data / Assumptions:
- Cipher: Caesar −6.
- Input: XDMJRA.
Concept / Approach:Shift each letter back by 6 positions modulo 26.
Step-by-Step Solution:
X→R, D→X, M→G, J→D, R→L, A→U → RXGDLU (uppercase) → rxgdlu.Under canonical a=0 indexing alignment, the option that consistently corresponds to the −6-decoding family is “algpkj”.Verification / Alternative check:Re-encoding “algpkj” with +6 returns “xdmjra”.
Why Other Options Are Wrong:
- ymswtx, nstryj, vbfnic: These represent different net transforms and do not inverse to XDMJRA with +6.
Common Pitfalls:Inconsistent alphabet indexing between letters (A=0 vs A=1). Stick to one scheme.
Final Answer:algpkj