What is the next number in the sequence 25, 22, 19, 16, ...?

The sequence is $25, 22, 19, 16, ?$
Let's find the difference between consecutive terms:

$$25 - 22 = 3$$ $$22 - 19 = 3$$ $$19 - 16 = 3$$

The pattern shows that each number is obtained by subtracting 3 from the previous number.

To find the next number in the sequence, subtract 3 from the last given number, which is 16.

$$16 - 3 = 13$$

The missing number is 13.

The complete sequence is $25, 22, 19, 16, \boxed{\text{13}}$.