Difficulty: Medium
Correct Answer: R
Explanation:
Introduction / Context:
This problem uses the same reversed-alphabet setup. We first identify the 11th letter from the right, then move 7 places to the left. Left and right must be interpreted with respect to the reversed sequence written left-to-right as Z, Y, X, …, A.
Given Data / Assumptions:
Concept / Approach:
Compute index of the 11th from right: 16, which is K. Now move 7 to the left: 16 − 7 = 9. The letter with reversed index 9 is R. Index arithmetic is the cleanest approach to avoid double reversals in your head.
Step-by-Step Solution:
Find reference: 11th from right → reversed index 16 → K.Shift left 7: 16 − 7 = 9 → letter R.Hence the answer is R.
Verification / Alternative check:
Convert via normal positions: K has normal position 11, so rpos(K) = 27 − 11 = 16. After a left shift of 7, rpos = 9; convert back: pos = 27 − 9 = 18, which is R (A=1 → R=18). Both methods align.
Why Other Options Are Wrong:
Common Pitfalls:
Forgetting to convert “from the right” to a reversed index, or accidentally adding instead of subtracting when moving to the left. Keep a small index table handy for sanity checks.
Final Answer:
R
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