1.What keeps the water in swimming pools clean?

Oxygen

Chlorine

Fluorine

Boron

Your display name:

#	Player	Score	Quizzes
🥇	DaringPathfinder41	597	72
🥈	CuriousExplorer64	509	59
🥉	CuriousExplorer64	477	54
4	CuriousExplorer64	462	51
5	CraftyAdventurer17	454	50
6	CraftyAdventurer17	441	49
7	MightyAdventurer23	406	44
8	CuriousExplorer64	383	45
9	SharpPathfinder75	377	42
10	CraftyWanderer97	361	46
11	SpeedyChallenger20	346	37
12	CuriousExplorer64	329	38
13	CuriousExplorer64	300	36
14	CuriousExplorer64	268	32
15	Wheeler1001	254	27
16	SlyRiddler64	241	29
17	CraftyAdventurer17	239	26
18	MightySolver18	233	26
19	CuriousExplorer64	233	26
20	FearlessVoyager79	229	28
21	CuriousExplorer64	223	27
22	CraftySolver94	204	24
23	CuriousExplorer64	194	22
24	CleverAdventurer37	194	22
25	CuriousPuzzler87	190	23
26	CraftyAdventurer17	188	21
27	SavvyPathfinder96	177	19
28	CuriousExplorer64	172	20
29	CraftyExplorer98	170	21
30	Bubbs64	169	19
31	SharpPathfinder75	168	18
32	CuriousExplorer64	168	20
33	SavvyPathfinder96	167	18
34	CraftyAdventurer17	164	19
35	Bubbs64	158	18
36	FearlessExplorer97	156	18
37	CraftySolver94	155	19
38	CuriousExplorer64	149	18
39	SavvyExplorer92	149	16
40	CuriousExplorer64	148	16
41	CraftyChallenger31	147	16
42	TrickyAdventurer39	147	18
43	SharpPathfinder75	145	16
44	SneakySeeker67	144	15
45	SavvyExplorer92	144	16
46	CuriousExplorer64	136	16
47	CraftyWanderer63	135	14
48	TrickyRiddler73	134	17
49	SavvyMaze97	128	13
50	CuriousExplorer64	128	15
• • •
2478	WittyRiddler92	9	11
2479	SharpPathfinder56	8	1
2480	DaringMaze59	8	1
2481	DaringScout83	8	1
2482	SlyPuzzler92	8	1
2483	FearlessVoyager76	8	1

#	Player	Score	Quizzes
🥇	DaringPathfinder41	597	72
🥈	CuriousExplorer64	300	36
🥉	CleverAdventurer37	194	22
4	CuriousExplorer64	168	20
5	SavvyExplorer92	149	16
6	TrickyAdventurer39	147	18
7	SavvyExplorer92	144	16
8	CraftyWanderer63	135	14
9	TrickyRiddler73	124	16
10	CuriousExplorer64	93	11
11	SavvyExplorer92	92	10
12	CuriousPuzzler87	85	10
13	BrainyChallenger30	79	9
14	CuriousExplorer64	78	10
15	MightySolver18	74	8
16	CuriousExplorer64	67	7
17	CleverSeeker98	57	8
18	CuriousExplorer64	55	6
19	DaringWanderer42	52	6
20	DaringScout88	51	8
21	SneakyMaze11	50	7
22	CuriousExplorer64	48	6
23	CraftyExplorer82	47	5
24	SneakyExplorer45	47	6
25	BrainyVoyager76	47	5
26	CleverPathfinder68	45	5
27	MightyExplorer62	45	5
28	CuriousPuzzler87	44	5
29	NimbleSolver29	44	5
30	DaringChallenger97	43	5
31	JazzyTequila75	43	6
32	SlyRunner91	43	5
33	CraftyAdventurer51	43	6
34	SpeedySeeker30	42	5
35	SharpRunner85	42	5
36	MightyPathfinder35	41	5
37	CuriousAdventurer83	39	4
38	CuriousExplorer64	38	4
39	FearlessSolver29	38	4
40	CuriousNavigator45	38	4
41	DaringNavigator53	38	4
42	NimbleNavigator77	37	5
43	BrainyWanderer74	37	4
44	FearlessVoyager98	37	4
45	SneakyWanderer54	37	4
46	SharpExplorer29	36	4
47	DaringNavigator47	36	4
48	FearlessScout82	35	4
49	CuriousExplorer64	35	4
50	CraftyMaze96	34	4
• • •
1829	WittyRiddler92	1	3