1, 10, 7, 20, 13, 30, 19, ... choose which pair of numbers comes next?
1, 3, 5, 7, ? , 13
1, 9, 25, ?, 81
1,121, 441, 961, 1681, ?
1.5, 2.3, 3.1, 3.9, ... What number should come next?
10, 20, 25, 35, 40, 50, 55, ... choose which pair of numbers comes next?
11, 12, 17, 18, 23, 24, (....) . Which term will come next ?
11, 16, 21, 26, 31, 36, 41, ... choose which pair of numbers comes next?
12 _ 41 _34123 _ _ 234
12 : 72 : : 14 : ?