Respuesta :

Answer:

10

Step-by-step explanation:

We can know the differences from each number

1, -2, 5, 2, 9, 6, 13, ...

~-3~7~-3~7~-3~7

The next number gonna be minus three again

So, 13 + (-3)

= 13 - 3

= 10

Hopefully help