What is the next number in the sequence? 2,3,5,7,11,13...

15
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The sequence 2,3,5,7,11,13 includes prime numbers only. Many people incorrectly select 15, fooled by the fact that all prime numbers except 2 are odd.
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Answers by country

15
17
19
21
answers
flagFrance
10%
84%
0%
5%
19
flagthe Netherlands
20%
75%
5%
0%
20
flagAustralia
17%
71%
2%
8%
35
flagGermany
28%
57%
6%
3%
226
flagGreece
35%
57%
7%
0%
14
flagIndia
29%
55%
5%
4%
196
flagSwitzerland
37%
55%
0%
3%
29
flagthe United Kingdom
27%
53%
9%
7%
122
flagCanada
33%
51%
7%
3%
27
flagMalaysia
41%
50%
8%
0%
12
flagGhana
50%
50%
0%
0%
10
flagAustria
38%
46%
15%
0%
39
flagPakistan
26%
46%
6%
20%
15
flagPoland
39%
45%
7%
4%
13648
flagthe United States
33%
42%
7%
8%
272
flagRepublic of Ireland
33%
42%
19%
4%
21
flagUnknown
50%
41%
2%
0%
34
flagthe Philippines
39%
39%
10%
3%
28