Difficulty: Medium
Correct Answer: QPLJY
Explanation:
Introduction / Context:
This coding question uses a pattern where the shift applied to each letter depends on its position in the word. The examples "MATCH" → "NYWYM" and "BOARD" → "CMDNI" reveal an alternating sequence of positive and negative shifts whose magnitudes increase. We must identify this sequence and apply it to the word "PRINT".
Given Data / Assumptions:
Concept / Approach:
By comparing each letter in the original words with its coded counterpart, we determine the numeric shift at each position. For both given words, the pattern is +1, −2, +3, −4, +5 for positions 1 through 5. We then apply this same sequence of shifts to the letters of "PRINT".
Step-by-Step Solution:
Step 1: Confirm the pattern using MATCH → NYWYM.
M(13) → N(14): +1.
A(1) → Y(25): −2 (wrap: 1 − 2 = −1; −1 + 26 = 25).
T(20) → W(23): +3.
C(3) → Y(25): −4 (3 − 4 = −1; −1 + 26 = 25).
H(8) → M(13): +5.
So the pattern of shifts is: +1, −2, +3, −4, +5.
Step 2: Check the same pattern with BOARD → CMDNI.
B(2) → C(3): +1.
O(15) → M(13): −2.
A(1) → D(4): +3.
R(18) → N(14): −4.
D(4) → I(9): +5.
The pattern is confirmed.
Step 3: Apply this pattern to PRINT.
Word: P R I N T.
Positions: 1 2 3 4 5.
Position 1 (+1): P(16) + 1 = 17 → Q.
Position 2 (−2): R(18) − 2 = 16 → P.
Position 3 (+3): I(9) + 3 = 12 → L.
Position 4 (−4): N(14) − 4 = 10 → J.
Position 5 (+5): T(20) + 5 = 25 → Y.
Step 4: Combine coded letters.
PRINT → Q P L J Y → "QPLJY".
Verification / Alternative check:
You can reapply the +1, −2, +3, −4, +5 pattern to MATCH and BOARD to confirm you get NYWYM and CMDNI respectively. This double-check ensures you have not miscalculated any of the shifts and that the pattern is truly consistent.
Why Other Options Are Wrong:
Other choices rearrange letters or correspond to different shift values. For instance, codes ending with a letter other than Y contradict the requirement that T must be shifted by +5 to give Y.
Common Pitfalls:
It is easy to forget the negative shifts or to fail to handle wrap-around correctly when subtracting. Some candidates mistakenly apply the same shift to all positions instead of an alternating sequence. Always verify the full pattern on all example letters.
Final Answer:
Using the same alternating shift pattern, "PRINT" is coded as QPLJY.
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