Harder Extension 1 Topics (1 Viewer)

[study1234]

Which books has the best questions for Harder Extension 1? Most of them simply neglect it.

 

[anomalousdecay]

I use Terry Lee and Cambridge. Cambridge has 72 questions in it. Terry Lee has 61 questions.
However, Cambridge completely neglects perm. and comb.
I haven't done harder ext.1 but I think Terry Lee's looks more suitable for grasping everything, then Cambridge for practising again if necessary.

Hope this helps.