12, 6, 6, 9, 18,

58      83      133      ?       308       433

156, 172, 196, ?, 268, 316

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

24, 8, 15, ?, 12, 4

500, 400, 315, 245, ?, 150

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

77, 198, 342, 511, 707, ?

√(10198 )× √(7220 )÷ 16.69 + 2010.375= ?

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

112, 116, 121, ?, 134, 142

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

555, 430, ?, -320, -1320, -3320 

17 21 51 169 701 ?

6, 7, 16, 51, 208, ?