Difficulty: Easy
Correct Answer: T
Explanation:
Introduction / Context:Right-side indexing means we count from Z towards A. The 7th-from-right letter is thus obtained by either direct right-counting or by converting to the left index with the standard relation R + L = 27.
Given Data / Assumptions:
Concept / Approach:Use either method:
Method 1 (Direct): Z(1), Y(2), X(3), W(4), V(5), U(6), T(7).Method 2 (Formula): L = 27 - R = 27 - 7 = 20; the 20th letter is T.Step-by-Step Solution:
Apply Method 1 or Method 2; both give T.Verification / Alternative check:Cross-verify by listing from A: A(1) … T(20). Since L=20, R must be 27 - 20 = 7. Consistent.
Why Other Options Are Wrong:They correspond to different right indices (e.g., V is 5th from right, U is 6th from right).
Common Pitfalls:Miscounting when switching between left and right indexing. Keep R + L = 27 in mind.
Final Answer:T
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