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

15
17
19
21
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.

Answers distribution

15
17
19
21
answers
flagSwitzerland
11%
76%
11%
0%
17
flagSpain
21%
69%
0%
4%
23
flagBelgium
23%
69%
0%
0%
13
flagFrance
37%
62%
0%
0%
32
flagItaly
27%
62%
3%
6%
29
flagUkraine
28%
60%
4%
4%
25
flagPoland
33%
54%
6%
3%
13623
flagthe Netherlands
27%
54%
15%
2%
44
flagthe United Kingdom
35%
53%
5%
3%
319
flagIndia
30%
52%
4%
5%
111
flagAustralia
39%
52%
0%
4%
23
flagGermany
32%
51%
6%
4%
192
flagCanada
29%
51%
6%
9%
31
flagNorway
29%
50%
8%
8%
34
flagthe United States
31%
47%
6%
7%
296
flagSweden
42%
47%
0%
10%
19
flagRepublic of Ireland
42%
46%
4%
2%
45
flagUnknown
37%
43%
9%
6%
562
flagCzech Republic
53%
38%
7%
0%
13
flagthe Philippines
52%
28%
14%
4%
21

Gender

men53%
women53%
15
33%
36%
17
53%
53%
19
7%
6%
21
5%
3%

Language versions

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What is the next number in the sequence? 2,3,5,7,11,13...
709
51%

Details

Author: Kasia
Illustration: D. Sharon Pruitt
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