31
20 is the next number greater than 19. The next prime number greater than 19 is 23.
27.
i think the answere is 38
27, 26, 37, 37
The next number is 27. Nice puzzle! The reason is on discussion page, for those who are still working on it.
Next is xx which is 20 xix = 10 + (10-1) = 19
If you mean: 9, 19, 39, 69 then the next number in the sequence is 109
Ten.
35
67
After 19 comes 20. In the base-10 numbering system, numbers are organized in a sequential order from 0 to 9, and then the next number is formed by adding a digit in the tens place and resetting the units place to 0. So, after 19 (which is composed of 1 in the tens place and 9 in the units place), the next number is 20 (with 2 in the tens place and 0 in the units place).
10