Category	Heard	PPB	Easy %	Medium %	Hard %
Ancient History and Archaeology	20	12.00	85%	30%	5%
Beliefs	66	13.48	92%	30%	12%
British and Commonwealth History	18	13.89	94%	33%	11%
Current Events	15	18.00	100%	60%	20%
Fine Arts - Auditory Fine Arts	36	12.50	92%	28%	6%
Fine Arts - Visual Fine Arts	39	11.79	90%	23%	5%
Geography	12	16.67	92%	67%	8%
History - American History	39	13.85	90%	36%	13%
History - European History	28	12.86	82%	29%	18%
History - World History	31	13.55	87%	39%	10%
Literature - American Literature	37	12.70	84%	41%	3%
Literature - British Literature	36	13.06	83%	33%	14%
Literature - European Literature	33	13.03	82%	39%	9%
Other Academic	12	12.50	58%	50%	17%
Other Arts: Auditory	15	10.67	80%	27%	0%
Other Arts: Visual	14	12.86	79%	43%	7%
Other Science: Astronomy	4	15.00	100%	50%	0%
Other Science: Computer Science	12	5.83	50%	8%	0%
Other Science: Earth Science	12	10.00	67%	17%	17%
Other Science: Math	9	6.67	56%	11%	0%
Philosophy	38	12.37	95%	18%	11%
Science - Biology	35	9.14	74%	17%	0%
Science - Chemistry	39	8.72	74%	8%	5%
Science - Physics	32	8.44	75%	6%	3%
Social Science	30	12.67	87%	33%	7%
World and Other Literature	34	11.18	77%	32%	3%