-2,3,1,4,5,9,.... which is most likely the 10th value in the sequence??

Answer 1

Hint:
Reminds me of the Fibonacci numbers.

Answer 2

Okay... What does that mean?

Answer 3

This is a Fibonacci sequence, where the next term is the sum of two preceding terms. For instance the 3rd term (which is 1), is the sum of -2 and 3, and the 4th term (which is 4), is the sum of 3 and 1, and so on.
Therefore,
-2, 3, 1, 4, 5, 9, 14, 23, 37, 60, ...