Question
Find the wrong number in the given series:
 10          13       26        203           806              20157ÂSolution
10 × 12 + 3 = 13 13 ×  2 - 4 = 22 22 × 32 + 5 = 203 203 × 4 - 6 = 806 806 × 52 + 7 = 20157
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