Match the average rainfall with climatic region:

25     25     37.5     ?     328.125     1804.6875

117, 117, 121, 129, 141, ?

81 72 136 111 ? 278

4, 12, 36, 108, ?, 396

120, 130, 145, 165, ?,  220

Find the missing number, in the given number series.

6, 12, 36, ?, 720, 4320

1236, 1445, 1675, 1933, 2226, ?

6       11       32       111       ?      2345      14100

7      8       ?       13       17        22      28

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

80, 200, 400, 600, ?, 300