What is the next number 2 7 8 3 12 9?

The next number in the sequence appears to be 16.

To find the pattern, we can see that each number is either the sum or difference of the two numbers before it.

2 + 7 = 9 7 - 8 = -1 8 + 3 = 11 3 + 12 = 15 12 - 9 = 3

Therefore, the next number would be 9 + 7 = 16.