How many member states does the EU have today?

EDITORIAL LEARNING AID

Why is this answer correct?

Since the United Kingdom left in 2020, the European Union has had a total of 27 member states. The figures 21 and 23 never existed, and the EU had 25 members only from 2004 to 2006.

EU today: 27 member states.

This translation and explanation are editorial learning aids. The official German wording and answer key govern the examination.