What is the `15^(th)` term of the series 3, 7, 13, 21, 31, 43, …….?

Find the n^(th) terms of the series 5 + 7 + 13 + 31 + …

Find the n^(th) terms of the series 5 + 7 + 13 + 31 + …

Find the 15^(th) term of the series 3 - 6 +9 - 12 + …

Find the 15^(th) term of the series 3 - 6 +9 - 12 + …

The nth term of the series 3+7+13+ 21+….... is

The nth term of the series 3+7+13+21+... is

The 15th term of the series 243,81,27....... is

The 10^(th ) term of the series 3+13+29+51+79+.. ..

The following question, a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series. 1, 3, 7, 13, 21, 31, 43, ?