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Start learning 50% faster. Sign in nowThe logic followed here is as follows (3rd number - 1st number)² = 2nd number (15, 100, 25) → (25 – 15)² = 10² = 100. (12, 49, 19) → (19 – 12)² = 7² = 49. (28, 49, 35) → (35 – 28)² = 7² = 49. (19, 81, 28) → (28 – 19)² = 9² = 81. (10, 30, 15) → (15 – 10)² = 5² = 25.
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