Sphere Online Judge (SPOJ)

list of riddle problems

ID	NAME	QUALITY	USERS	ACC %	DIFFICULTY C I
425	Kill evil instantly		163	10.36
6291	Problem	5	621	29.02	1 30
6466	Guess the task II	1	143	12.96	1 17
6467	Guess the task III	2	82	7.17	1 26
6469	Guess the task V		38	27.27
10657	LOGIC	4	1291	63.43	6 19
11781	SEQUENCE		54	27.93
11784	The Easiest Sequence Of the World!!		142	30.91
12962	External Sequence		69	64.51
13877	LOGIC	2	116	24.13	34 34
14304	Jaddouic Sequence		88	30.15
15019	Strange Pattern (Easy)	4	446	30.49	11 15
15033	Strange Pattern (Medium)		60	13.52	1 17
15034	Strange Pattern (Hard)		39	14.29	12 23
15042	Strange Pattern (Impossible)	2	43	18.33	1 30
15400	Just Guess The Output !		6	0.43
15426	Just Guess The Output ! (Very Easy)		131	4.20	1 1
15765	N-th Term		11	14.05
15784	Coder Express 4!!	1	19	23.08	17 17
15910	Sum The Amazing Series	2	16	24.00	26 50
17659	Time to get a job	3	437	42.93	12 17
17719	Guess The Setters		39	48.19	1 1
17949	Fight with Abhishek	2	109	50.44	34 50
19828	Sasha is a noob	2	122	18.65	50 50
19829	Sasha is a noob v2	1	73	14.61	50 50
19945	Learn to Read	3	102	7.60	12 23
20549	Progressions	1	68	49.01	1 6
22767	CAT and XAT	5	126	54.86	1 4
25741	AMUSING SEQUENCE	1	41	35.94	1 50
28289	Strange Pattern (Impossible) (Hard)	1	2	3.51	42 26
31644	No Description 1		8	36.00
31935	memes FeelsGoodMan	2	13	9.03	50 50
32000	Under the Spreading Chestnut Tree		1	16.67
34160	Strange Pattern (bugged)		1	3.03	34 34