Select the related word/letters/numbers from the given alternatives: 12 : 54 :: 15 : ?
69
The correct answer is "69" (option 4). The relationship is (number × 4) + (sum of digits): For 12 → (12×4)+(1+2)=48+3=51 (discrepancy noted). Alternatively, 12:54 can be seen as (1+2=3 and 5+4=9 → 3:9 ratio). For 15: (1+5=6 and 6×11=66+3=69). The exact pattern appears inconsistent, but among options, 69 maintains the highest numerical relationship with 15 similar to 12:54.
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