2. A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series. 206, 309, 412, ?, 618, 721
3. A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series. (3, 5), (5, 7) ( ? ), (11, 13)
6. A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series. 200, 100, 50, 25, 12.5, 6.25, ?