From Cleeks, Crushers and HyFlyers to Catherine the Great, Julia Gillard and Boris Johnson, test your knowledge with the Saturday quiz

1 Which national flag has been modified 26 times?

2 What is the first letter that doesn’t name a vitamin?

3 Which late pianist was the first to record all of Beethoven’s piano works?

4 In legend, what joined the yoke to the pole of a Phrygian wagon?