Who was the first winner of the Pro Kabaddi

Find the missing term.

D – 4, F – 6, H – 8, J – 10, ?, ?

2              3.5          11.5        44           192.5     988

4 12 ? 144 544 2112

10, 22, 46, ?, 130, 190

7200 7200 3600 1200 300 ?

Select the number from among the given options that can replace the question mark (?) in the following series.

2, 6, 12, 20, ?, ?

If 4 10 16 26 x 50

Then find the value of (x² - 1) + ( x² + 1).

If 10 9 38 x 5428

Then, 2x² + 1 = ?