2 : 0 :: 4 : ?
2, 1, 1/2, 1/4, . . . . . . What number should come next?
2, 15, 41, 80, ? . Complete the series.
2, 2, 4, 6, ?, 10, 8, 14, 10
2, 3, 4, 5, 6, 4, 8, ... choose which pair of numbers comes next?
2, 4, 6, 8, 10, ... What number should come next?
2, 6, 18, 54, ... What number should come next?
2, 8, 14, 20, 26, 32, 38, ... choose which pair of numbers comes next?
2,5,9,?,20,27, what will replace the question mark ?
2/3, 4/7, 7/13, 11/21, ?