Sphere Online Judge (SPOJ)

list of riddle problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
425	Kill evil instantly		163	10.12
6291	Problem	5	694	29.63	1 30
6466	Guess the task II	2	159	12.43	11 26
6467	Guess the task III	2	86	6.72	1 34
6469	Guess the task V		38	26.17
10657	LOGIC	8	1419	63.85	5 21
11781	SEQUENCE		54	27.93
11784	The Easiest Sequence Of the World!!		142	30.41
12962	External Sequence	2	73	63.52	9 17
13877	LOGIC	3	126	24.12	34 34
14304	Jaddouic Sequence	2	93	30.20	9 26
15019	Strange Pattern (Easy)	5	487	29.92	11 14
15033	Strange Pattern (Medium)		64	13.14	9 9
15034	Strange Pattern (Hard)		40	14.15	13 21
15042	Strange Pattern (Impossible)	2	44	17.92	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		12	12.95
15784	Coder Express 4!!	1	19	22.60	17 17
15910	Sum The Amazing Series	2	26	30.53	26 50
17659	Time to get a job	3	449	43.13	12 17
17719	Guess The Setters	1	41	48.84	1 1
17949	Fight with Abhishek	2	109	50.44	34 50
19828	Sasha is a noob	3	139	18.52	26 46
19829	Sasha is a noob v2	1	78	14.72	50 50
19945	Learn to Read	3	107	7.46	12 23
20549	Progressions	1	77	50.61	1 9
22767	CAT and XAT	9	150	52.72	5 6
25741	AMUSING SEQUENCE	1	43	36.36	1 50
28289	Strange Pattern (Impossible) (Hard)	1	3	5.17	42 26
31644	No Description 1	1	10	26.19	1 17
31935	memes FeelsGoodMan	3	15	8.82	50 50
32000	Under the Spreading Chestnut Tree		1	6.25
34160	Strange Pattern (bugged)		1	1.59	34 34
36808	Find my favourite	1	0	0.00	1 1