Which State is least developed when it comes to

16, 32, 68, 132, ?, 376

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

60, 94, 184, 464, 1388, ?

Complete the series choosing the missing number.

110, 99, 86, ___, 54, 35.

380, ?,  360, 324, 260, 160

8         27          64         125       ?         343 

137, 130, ?, 95, 67, 32

2, 13, 27, 44, ?, 87

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

20, ?, 30, 60, 150, 450

5      3      4      7.5      17       ?       138

1290, 1225, 1175, ?, 1112, 1095, 1085