Question
7, 9, 21, ?, 107,
197 What will be come in place of question mark (?) in the given number seriesSolution
ATQ, 7 + 1 × 2 = 9 9 + 3 × 4 = 21 21 + 5 × 6 = 51 51 + 7 × 8 = 107 107 + 9 × 10 = 197
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