The incorporation of CO2 into water is known

18, 22, 28, 38, 54, ?,

612, 487,?, 396, 388, 387

4      11        22       ?        56      79      106

What will come in place of the question mark (?) in the following series?

17, 81, 131, 169, 197, ?

114, 134, 174, 254, 414, ? 

165        155      135      ?      65       15

Find the missing character. 

What will come in place of (?) Question mark in the given number series.

5, 26, 68, 131, 215, 320, ?

415 246 367 ? 335 310

500, 400, 315, 245, ?, 150