more performant question selection; fixes #104
more performant question selection; fixes #104

Maroben/MoblerCards,phish108/MoblerCards,phish108/MoblerCards,Maroben/MoblerCards,phish108/MoblerCards,Maroben/MoblerCards,phish108/MoblerCards,phish108/MoblerCards,Maroben/MoblerCards,Maroben/MoblerCards