Sphere Online Judge (SPOJ)

list of riddle problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
425	Kill evil instantly		163	10.17
6291	Problem	5	677	29.45	1 30
6466	Guess the task II	2	156	12.72	13 26
6467	Guess the task III	2	86	6.85	1 34
6469	Guess the task V		38	26.90
10657	LOGIC	7	1383	64.20	4 21
11781	SEQUENCE		54	27.93
11784	The Easiest Sequence Of the World!!		142	30.58
12962	External Sequence	2	72	65.12	9 17
13877	LOGIC	3	125	24.20	34 34
14304	Jaddouic Sequence	1	91	30.06	1 17
15019	Strange Pattern (Easy)	5	479	30.16	11 14
15033	Strange Pattern (Medium)		63	12.97	9 9
15034	Strange Pattern (Hard)		40	14.15	13 21
15042	Strange Pattern (Impossible)	2	44	18.12	1 30
15400	Just Guess The Output !	1	8	0.54	1 1
15426	Just Guess The Output ! (Very Easy)	1	140	4.23	1 1
15765	N-th Term		11	13.28
15784	Coder Express 4!!	1	19	23.08	17 17
15910	Sum The Amazing Series	2	18	25.64	26 50
17659	Time to get a job	3	446	43.12	12 17
17719	Guess The Setters		40	48.24	1 1
17949	Fight with Abhishek	2	109	50.44	34 50
19828	Sasha is a noob	3	138	18.70	26 46
19829	Sasha is a noob v2	1	73	14.03	50 50
19945	Learn to Read	3	102	7.33	12 23
20549	Progressions	1	73	49.38	1 9
22767	CAT and XAT	8	147	52.94	3 5
25741	AMUSING SEQUENCE	1	42	35.88	1 50
28289	Strange Pattern (Impossible) (Hard)	1	3	5.17	42 26
31644	No Description 1	1	10	27.50	1 17
31935	memes FeelsGoodMan	3	15	8.88	50 50
32000	Under the Spreading Chestnut Tree		1	16.67
34160	Strange Pattern (bugged)		1	1.72	34 34