The given sequence is: $-10, -6, -2, \_, 6, 10$.

To find the missing number, observe the pattern in the sequence. The difference between consecutive terms is:

$-6 - (-10) = 4, \quad -2 - (-6) = 4, \quad 6 - \text{?} = 4, \quad 10 - 6 = 4.$

Each number increases by 4. So, to find the missing number, add 4 to $-2$:

$-2 + 4 = 2.$

Thus, the missing number is 2.

The complete sequence is: $-10, -6, -2, 2, 6, 10$.

Would you like more details on sequences or further explanation?

Related questions:

1. What is the general formula for an arithmetic sequence?
2. How do you find the common difference in a sequence?
3. Can an arithmetic sequence contain negative numbers throughout?
4. How would you find the sum of all terms in an arithmetic sequence?
5. What happens to a sequence if the common difference is negative?

Tip:

In an arithmetic sequence, the difference between any two consecutive terms is always constant.