Depending upon the variety, the recommended seed rate

143        119      107      101       98      ?

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

325, 292, 262, 229, ?, 166

38, 41, 50, ?, 158, 401 

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

92, 153, 220, ?, 364, 443

Choose the missing term.

3F, 6G, 11I, 18L,?

Find the missing number in the given number series.

4, 9, 20, 37, 60, ?

64      32        32         48        96         ?

1221,      1100,      1000,      919,        ?

415 246 367 ? 335 310

11           22.5        47           102         236         ?