Library /CEMC Cayley

CEMC Cayley

470 problems here, rated 1 to 4.9 on our scale (Junior to AIME). Years covered: 1998–2026.

Algebra 287Combinatorics 26Geometry 110Number theory 47

#	Topic	Diff	Type	Year
1	Algebra	1.0	answer	2006	open
2	Algebra	1.0	answer	2010	open
3	Geometry	1.0	answer	2003	open
4	Algebra	1.0	answer	2008	open
5	Algebra	1.0	answer	2007	open
6	Algebra	1.0	answer	2004	open
7	Algebra	1.0	answer	2006	open
8	Algebra	1.0	answer	2010	open
9	Algebra	1.0	answer	2011	open
10	Geometry	1.0	answer	2011	open
11	Algebra	1.0	answer	2008	open
12	Algebra	1.0	answer	2010	open
13	Algebra	1.0	answer	2000	open
14	Algebra	1.0	answer	2009	open
15	Algebra	1.0	answer	1998	open
16	Combinatorics	1.0	answer	2004	open
17	Algebra	1.0	answer	2006	open
18	Algebra	1.0	answer	2007	open
19	Geometry	1.0	answer	2005	open
20	Algebra	1.0	answer	2002	open
21	Algebra	1.0	answer	2004	open
22	Algebra	1.0	answer	2004	open
23	Algebra	1.0	answer	2010	open
24	Algebra	1.0	answer	2011	open
25	Algebra	1.0	answer	2005	open
26	Algebra	1.0	answer	2005	open
27	Algebra	1.0	answer	2010	open
28	Algebra	1.0	answer	2002	open
29	Algebra	1.0	answer	2001	open
30	Algebra	1.0	answer	2000	open
31	Algebra	1.0	answer	2003	open
32	Number theory	1.0	answer	2003	open
33	Algebra	1.0	answer	1999	open
34	Algebra	1.0	answer	2011	open
35	Geometry	1.0	answer	2010	open
36	Algebra	1.0	answer	2011	open
37	Algebra	1.0	answer	2011	open
38	Algebra	1.0	answer	1998	open
39	Algebra	1.0	answer	2008	open
40	Algebra	1.0	answer	2003	open
41	Algebra	1.0	answer	2008	open
42	Algebra	1.0	answer	2011	open
43	Algebra	1.0	answer	2006	open
44	Algebra	1.0	answer	2009	open
45	Algebra	1.0	answer	2002	open
46	Algebra	1.0	answer	2005	open
47	Geometry	1.0	answer	2006	open
48	Combinatorics	1.0	answer	2004	open
49	Algebra	1.0	answer	2007	open
50	Algebra	1.0	answer	2002	open
51	Number theory	1.0	answer	2000	open
52	Number theory	1.0	answer	1999	open
53	Algebra	1.0	answer	2004	open
54	Algebra	1.0	answer	2006	open
55	Algebra	1.0	answer	2011	open
56	Algebra	1.0	answer	2005	open
57	Algebra	1.0	answer	2003	open
58	Algebra	1.0	answer	2002	open
59	Algebra	1.0	answer	2002	open
60	Algebra	1.0	answer	2009	open
61	Algebra	1.0	answer	2004	open
62	Algebra	1.0	answer	2006	open
63	Algebra	1.0	answer	2005	open
64	Algebra	1.0	answer	2000	open
65	Number theory	1.0	answer	2008	open
66	Geometry	1.0	answer	1998	open
67	Combinatorics	1.0	answer	2008	open
68	Algebra	1.0	answer	2002	open
69	Algebra	1.0	answer	2002	open
70	Algebra	1.0	answer	2005	open
71	Geometry	1.0	answer	1999	open
72	Geometry	1.0	answer	2010	open
73	Algebra	1.0	answer	2002	open
74	Algebra	1.0	answer	2010	open
75	Algebra	1.0	answer	1998	open
76	Geometry	1.0	answer	1999	open
77	Algebra	1.0	answer	2004	open
78	Algebra	1.0	answer	2006	open
79	Algebra	1.0	answer	2007	open
80	Algebra	1.0	answer	2001	open
81	Geometry	1.0	answer	2000	open
82	Algebra	1.0	answer	2002	open
83	Geometry	1.0	answer	1999	open
84	Algebra	1.0	answer	2001	open
85	Geometry	1.0	answer	2003	open
86	Number theory	1.0	answer	2010	open
87	Algebra	1.0	answer	2008	open
88	Algebra	1.0	answer	2006	open
89	Algebra	1.0	answer	2004	open
90	Algebra	1.0	answer	2006	open
91	Algebra	1.0	answer	2007	open
92	Algebra	1.0	answer	2007	open
93	Number theory	1.0	answer	2009	open
94	Algebra	1.0	answer	2007	open
95	Geometry	1.0	answer	2004	open
96	Algebra	1.0	answer	2000	open
97	Algebra	1.0	answer	2008	open
98	Algebra	1.0	answer	1999	open
99	Algebra	1.0	answer	1998	open
100	Algebra	1.0	answer	2010	open
101	Number theory	1.0	answer	2008	open
102	Algebra	1.0	answer	1999	open
103	Algebra	1.0	answer	2009	open
104	Algebra	1.0	answer	2005	open
105	Algebra	1.0	answer	1998	open
106	Algebra	1.0	answer	2003	open
107	Algebra	1.0	answer	1999	open
108	Algebra	1.0	answer	2011	open
109	Algebra	1.0	answer	2006	open
110	Algebra	1.0	answer	2003	open
111	Algebra	1.0	answer	2011	open
112	Algebra	1.0	answer	2001	open
113	Algebra	1.0	answer	2014	open
114	Algebra	1.0	answer	2025	open
115	Algebra	1.0	answer	2020	open
116	Algebra	1.0	answer	2023	open
117	Algebra	1.0	answer	2022	open
118	Algebra	1.0	answer	2021	open
119	Algebra	1.0	answer	2024	open
120	Algebra	1.0	answer	2015	open
121	Number theory	1.1	answer	2022	open
122	Algebra	1.1	answer	2020	open
123	Algebra	1.1	answer	2014	open
124	Algebra	1.1	answer	2023	open
125	Algebra	1.1	answer	2024	open
126	Algebra	1.1	answer	2015	open
127	Algebra	1.1	answer	2026	open
128	Algebra	1.1	answer	2022	open
129	Geometry	1.1	answer	2021	open
130	Geometry	1.1	answer	2014	open
131	Algebra	1.1	answer	2020	open
132	Algebra	1.1	answer	2025	open
133	Algebra	1.1	answer	2026	open
134	Algebra	1.1	answer	2021	open
135	Combinatorics	1.1	answer	2023	open
136	Algebra	1.1	answer	2024	open
137	Algebra	1.2	answer	2022	open
138	Algebra	1.2	answer	2014	open
139	Algebra	1.2	answer	2025	open
140	Geometry	1.2	answer	2024	open
141	Combinatorics	1.2	answer	2015	open
142	Algebra	1.2	answer	2022	open
143	Algebra	1.2	answer	2014	open
144	Algebra	1.2	answer	2026	open
145	Algebra	1.2	answer	2025	open
146	Algebra	1.2	answer	2024	open
147	Geometry	1.2	answer	2022	open
148	Algebra	1.2	answer	2021	open
149	Algebra	1.2	answer	2020	open
150	Algebra	1.2	answer	2015	open
151	Algebra	1.2	answer	2014	open
152	Geometry	1.3	answer	2014	open
153	Geometry	1.3	answer	2026	open
154	Algebra	1.3	answer	2020	open
155	Number theory	1.3	answer	2024	open
156	Number theory	1.3	answer	2015	open
157	Algebra	1.3	answer	2024	open
158	Algebra	1.4	answer	2014	open
159	Algebra	1.4	answer	2025	open
160	Algebra	1.4	answer	2024	open
161	Algebra	1.4	answer	2020	open
162	Algebra	1.4	answer	2022	open
163	Algebra	1.4	answer	2024	open
164	Algebra	1.4	answer	2015	open
165	Algebra	1.4	answer	2021	open
166	Algebra	1.4	answer	2014	open
167	Combinatorics	1.5	answer	2025	open
168	Algebra	1.5	answer	2026	open
169	Algebra	1.5	answer	—	open
170	Algebra	1.5	answer	2020	open
171	Algebra	1.5	answer	—	open
172	Algebra	1.6	answer	2021	open
173	Algebra	1.6	answer	2014	open
174	Algebra	1.6	answer	2025	open
175	Algebra	1.6	answer	—	open
176	Algebra	1.6	answer	2024	open
177	Algebra	1.6	answer	—	open
178	Algebra	1.7	answer	2023	open
179	Algebra	1.7	answer	—	open
180	Algebra	1.7	answer	—	open
181	Algebra	1.7	answer	—	open
182	Algebra	1.7	answer	—	open
183	Algebra	1.7	answer	—	open
184	Algebra	1.7	answer	—	open
185	Algebra	1.7	answer	—	open
186	Algebra	1.7	answer	—	open
187	Algebra	1.7	answer	—	open
188	Algebra	1.7	answer	—	open
189	Algebra	1.7	answer	—	open
190	Algebra	1.7	answer	—	open
191	Algebra	1.8	answer	—	open
192	Algebra	1.8	answer	—	open
193	Algebra	1.8	answer	—	open
194	Algebra	1.8	answer	—	open
195	Algebra	1.8	answer	—	open
196	Algebra	1.9	answer	—	open
197	Algebra	1.9	answer	—	open
198	Algebra	1.9	answer	—	open
199	Algebra	1.9	answer	—	open
200	Algebra	1.9	answer	—	open
201	Algebra	1.9	answer	—	open
202	Algebra	1.9	answer	—	open
203	Algebra	1.9	answer	—	open
204	Algebra	1.9	answer	—	open
205	Algebra	1.9	answer	—	open
206	Algebra	1.9	answer	—	open
207	Algebra	1.9	answer	—	open
208	Algebra	1.9	answer	—	open
209	Algebra	1.9	answer	—	open
210	Algebra	1.9	answer	—	open
211	Algebra	2.0	answer	—	open
212	Geometry	2.0	answer	—	open
213	Algebra	2.0	answer	—	open
214	Algebra	2.0	answer	—	open
215	Algebra	2.0	answer	—	open
216	Algebra	2.0	answer	—	open
217	Geometry	2.0	answer	2002	open
218	Algebra	2.0	answer	2007	open
219	Geometry	2.0	answer	2005	open
220	Number theory	2.0	answer	2011	open
221	Algebra	2.0	answer	2003	open
222	Number theory	2.0	answer	2010	open
223	Geometry	2.0	answer	1998	open
224	Combinatorics	2.0	answer	2008	open
225	Geometry	2.0	answer	2010	open
226	Number theory	2.0	answer	2001	open
227	Number theory	2.0	answer	2000	open
228	Algebra	2.0	answer	2001	open
229	Geometry	2.0	answer	2005	open
230	Algebra	2.0	answer	2003	open
231	Geometry	2.0	answer	2011	open
232	Geometry	2.0	answer	2003	open
233	Algebra	2.0	answer	2010	open
234	Algebra	2.0	answer	2010	open
235	Geometry	2.0	answer	2009	open
236	Number theory	2.0	answer	2008	open
237	Geometry	2.0	answer	2008	open
238	Number theory	2.0	answer	2005	open
239	Geometry	2.0	answer	2000	open
240	Number theory	2.0	answer	2002	open
241	Geometry	2.0	answer	2003	open
242	Number theory	2.0	answer	2000	open
243	Number theory	2.0	answer	2006	open
244	Algebra	2.0	answer	2011	open
245	Number theory	2.0	answer	2009	open
246	Algebra	2.0	answer	2004	open
247	Geometry	2.0	answer	2005	open
248	Number theory	2.0	answer	2010	open
249	Algebra	2.0	answer	2008	open
250	Algebra	2.0	answer	2005	open
251	Number theory	2.0	answer	2009	open
252	Geometry	2.0	answer	1999	open
253	Algebra	2.0	answer	2005	open
254	Geometry	2.0	answer	2007	open
255	Geometry	2.0	answer	1998	open
256	Algebra	2.0	answer	2003	open
257	Geometry	2.0	answer	2006	open
258	Algebra	2.0	answer	2004	open
259	Number theory	2.0	answer	2006	open
260	Algebra	2.0	answer	2004	open
261	Number theory	2.0	answer	2009	open
262	Algebra	2.0	answer	2006	open
263	Geometry	2.0	answer	1998	open
264	Geometry	2.0	answer	2000	open
265	Algebra	2.0	answer	2005	open
266	Geometry	2.0	answer	2008	open
267	Geometry	2.0	answer	1998	open
268	Combinatorics	2.0	answer	2001	open
269	Algebra	2.0	answer	2000	open
270	Geometry	2.0	answer	2009	open
271	Combinatorics	2.0	answer	1999	open
272	Geometry	2.0	answer	2003	open
273	Combinatorics	2.0	answer	1998	open
274	Geometry	2.0	answer	2000	open
275	Combinatorics	2.0	answer	2009	open
276	Geometry	2.0	answer	2009	open
277	Algebra	2.0	answer	2004	open
278	Combinatorics	2.0	answer	2002	open
279	Geometry	2.0	answer	2004	open
280	Geometry	2.0	answer	2004	open
281	Number theory	2.0	answer	2006	open
282	Algebra	2.0	answer	2007	open
283	Number theory	2.0	answer	2003	open
284	Algebra	2.0	answer	2011	open
285	Geometry	2.0	answer	2002	open
286	Combinatorics	2.0	answer	2009	open
287	Geometry	2.0	answer	2010	open
288	Geometry	2.0	answer	2010	open
289	Geometry	2.0	answer	2009	open
290	Geometry	2.0	answer	2007	open
291	Number theory	2.0	answer	2008	open
292	Algebra	2.0	answer	—	open
293	Algebra	2.0	answer	—	open
294	Algebra	2.0	answer	—	open
295	Algebra	2.0	answer	—	open
296	Algebra	2.0	answer	—	open
297	Algebra	2.0	answer	—	open
298	Algebra	2.0	answer	—	open
299	Algebra	2.0	answer	—	open
300	Algebra	2.1	answer	—	open
301	Algebra	2.1	answer	—	open
302	Algebra	2.1	answer	—	open
303	Geometry	2.1	answer	2025	open
304	Geometry	2.1	answer	2024	open
305	Algebra	2.1	answer	—	open
306	Algebra	2.1	answer	—	open
307	Algebra	2.1	answer	—	open
308	Geometry	2.1	answer	2015	open
309	Algebra	2.1	answer	—	open
310	Algebra	2.1	answer	—	open
311	Algebra	2.1	answer	—	open
312	Algebra	2.2	answer	—	open
313	Algebra	2.2	answer	—	open
314	Geometry	2.2	answer	2020	open
315	Geometry	2.2	answer	—	open
316	Algebra	2.2	answer	—	open
317	Algebra	2.2	answer	—	open
318	Algebra	2.2	answer	—	open
319	Algebra	2.2	answer	2024	open
320	Geometry	2.2	answer	2023	open
321	Algebra	2.2	answer	—	open
322	Geometry	2.2	answer	—	open
323	Algebra	2.2	answer	—	open
324	Algebra	2.2	answer	—	open
325	Algebra	2.2	answer	—	open
326	Algebra	2.2	answer	—	open
327	Algebra	2.2	answer	—	open
328	Algebra	2.2	answer	—	open
329	Algebra	2.3	answer	—	open
330	Algebra	2.3	answer	—	open
331	Geometry	2.3	answer	—	open
332	Algebra	2.3	answer	—	open
333	Algebra	2.3	answer	2023	open
334	Algebra	2.3	answer	—	open
335	Algebra	2.3	answer	—	open
336	Algebra	2.3	answer	—	open
337	Algebra	2.3	answer	—	open
338	Algebra	2.3	answer	—	open
339	Algebra	2.3	answer	2021	open
340	Algebra	2.3	answer	2023	open
341	Algebra	2.3	answer	2022	open
342	Combinatorics	2.3	answer	2020	open
343	Algebra	2.3	answer	—	open
344	Geometry	2.4	answer	2015	open
345	Geometry	2.4	answer	2021	open
346	Algebra	2.4	answer	2022	open
347	Algebra	2.4	answer	—	open
348	Algebra	2.4	answer	—	open
349	Geometry	2.4	answer	—	open
350	Number theory	2.4	answer	—	open
351	Algebra	2.4	answer	2014	open
352	Algebra	2.4	answer	2025	open
353	Algebra	2.4	answer	—	open
354	Algebra	2.4	answer	—	open
355	Geometry	2.5	answer	2024	open
356	Geometry	2.5	answer	2021	open
357	Number theory	2.5	answer	2023	open
358	Geometry	2.5	answer	—	open
359	Algebra	2.5	answer	2020	open
360	Geometry	2.5	answer	2015	open
361	Geometry	2.5	answer	—	open
362	Number theory	2.5	answer	—	open
363	Algebra	2.5	answer	—	open
364	Geometry	2.5	answer	2025	open
365	Algebra	2.5	answer	2024	open
366	Algebra	2.5	answer	2023	open
367	Algebra	2.5	answer	—	open
368	Algebra	2.5	answer	2024	open
369	Geometry	2.5	answer	2023	open
370	Algebra	2.5	answer	2025	open
371	Geometry	2.6	answer	2014	open
372	Algebra	2.6	answer	2015	open
373	Algebra	2.6	answer	—	open
374	Algebra	2.7	answer	2022	open
375	Algebra	2.7	answer	—	open
376	Algebra	2.7	answer	—	open
377	Geometry	2.7	answer	—	open
378	Geometry	2.7	answer	—	open
379	Number theory	2.7	answer	—	open
380	Number theory	2.7	answer	2023	open
381	Algebra	2.7	answer	2015	open
382	Geometry	2.7	answer	2025	open
383	Algebra	2.7	answer	2020	open
384	Algebra	2.7	answer	2021	open
385	Geometry	2.7	answer	—	open
386	Algebra	2.8	answer	2026	open
387	Geometry	2.8	answer	—	open
388	Number theory	2.8	answer	—	open
389	Algebra	2.8	answer	—	open
390	Algebra	2.9	answer	—	open
391	Algebra	3.0	answer	2003	open
392	Geometry	3.0	answer	2001	open
393	Number theory	3.0	answer	2008	open
394	Combinatorics	3.0	answer	2010	open
395	Geometry	3.0	answer	2011	open
396	Combinatorics	3.0	answer	2007	open
397	Algebra	3.0	answer	2010	open
398	Geometry	3.0	answer	2003	open
399	Geometry	3.0	answer	2008	open
400	Algebra	3.0	answer	2009	open
401	Geometry	3.0	answer	1998	open
402	Geometry	3.0	answer	2002	open
403	Algebra	3.0	answer	2005	open
404	Combinatorics	3.0	answer	2004	open
405	Geometry	3.0	answer	2010	open
406	Geometry	3.0	answer	2004	open
407	Algebra	3.0	answer	2011	open
408	Combinatorics	3.0	answer	1999	open
409	Number theory	3.0	answer	2002	open
410	Algebra	3.0	answer	2009	open
411	Number theory	3.0	answer	2005	open
412	Number theory	3.0	answer	2003	open
413	Number theory	3.0	answer	2001	open
414	Geometry	3.0	answer	2001	open
415	Number theory	3.0	answer	2000	open
416	Geometry	3.0	answer	2010	open
417	Algebra	3.0	answer	2008	open
418	Algebra	3.0	answer	2007	open
419	Geometry	3.0	answer	2004	open
420	Geometry	3.0	answer	1999	open
421	Algebra	3.0	answer	2002	open
422	Algebra	3.0	answer	2003	open
423	Geometry	3.0	answer	2005	open
424	Algebra	3.0	answer	1998	open
425	Algebra	3.0	answer	2006	open
426	Geometry	3.0	answer	2000	open
427	Geometry	3.0	answer	2005	open
428	Combinatorics	3.0	answer	2006	open
429	Combinatorics	3.0	answer	2005	open
430	Combinatorics	3.0	answer	2005	open
431	Geometry	3.0	answer	1998	open
432	Geometry	3.0	answer	2007	open
433	Geometry	3.0	answer	2007	open
434	Geometry	3.0	answer	1999	open
435	Geometry	3.0	answer	2009	open
436	Number theory	3.0	answer	1999	open
437	Geometry	3.2	answer	2025	open
438	Geometry	3.4	answer	2020	open
439	Number theory	3.4	answer	2026	open
440	Geometry	3.4	answer	2026	open
441	Algebra	3.5	answer	2021	open
442	Geometry	3.5	answer	2026	open
443	Geometry	3.5	answer	2022	open
444	Geometry	3.5	answer	2026	open
445	Algebra	3.6	answer	2014	open
446	Combinatorics	3.6	answer	2022	open
447	Geometry	3.6	answer	2015	open
448	Geometry	3.7	answer	2025	open
449	Geometry	3.7	answer	2025	open
450	Number theory	3.7	answer	2021	open
451	Algebra	3.7	answer	2024	open
452	Number theory	3.7	answer	2015	open
453	Geometry	3.7	answer	2014	open
454	Algebra	3.8	answer	2021	open
455	Geometry	3.8	answer	2020	open
456	Algebra	3.8	answer	2015	open
457	Algebra	4.6	answer	2021	open
458	Geometry	4.7	answer	2024	open
459	Number theory	4.7	answer	2015	open
460	Number theory	4.7	answer	2022	open
461	Combinatorics	4.7	answer	2026	open
462	Number theory	4.8	answer	2025	open
463	Algebra	4.8	answer	2024	open
464	Combinatorics	4.8	answer	2014	open
465	Geometry	4.8	answer	2023	open
466	Geometry	4.8	answer	2024	open
467	Combinatorics	4.8	answer	2022	open
468	Number theory	4.9	answer	2026	open
469	Combinatorics	4.9	answer	2025	open
470	Geometry	4.9	answer	2021	open

These are sorted by difficulty within the competition, but they aren't a course. The track is the route through, drawn from all the sources at once.