20, 20, 17, 17, 14, 14, 11, ... choose which pair of numbers comes next?

Find the missing term: 198, 194, 185, 169, ?

Find the missing term: 10, 100, 200, 310. ?

72, 76, 73, 77, 74, __, 75. What number should fill the blank?

4, 8, 22, 12, 16, 22, 20, 24, ... choose which pair of numbers comes next?

Find the missing term: 6, 18, 3, 21, 7, 56, ?

Find the missing term: 8, 28, 116, 584 , ?

What will come at the place of question mark ?<br>8, 22, 64, 190, 568, ?

Find the missing term: 2, 9, 28, ?, 126, 126, 217, 344