Question
12Â Â Â Â 17Â Â Â Â 44Â Â Â Â 147Â Â Â Â ?Â
  3065   18420Solution
12 × 1 + 5 = 17 17 × 2 + 10 = 44 44 × 3 + 15 = 147 147 × 4 + 20 = 608 608 × 5 + 25 = 3065 3065 × 6 + 30 = 18420
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