Number Series Test (adaptive)

Find the pattern and type the next number in each series. This is the Number Series Test given as an adaptive test: after each answer the next series is chosen to be near your estimated level, so you skip most of the ones that would be far too easy or too hard for you. You get 12 to 16 scored series. Untimed.

6 more are new series being tried out. They are mixed in at random places, look like the others and do not count toward your score; your answers to them tell us how hard they are.

Your score is a T-score relative to the 338 people who took the full 50-item test on this site: 50 is their average and 10 their standard deviation. They are not a sample of the general population; on the tests here that have outside norms, this site's takers average about one standard deviation above it. The difficulty of each series is estimated from their answers.