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
10%
80%
10%
0%
20
flagSpain
21%
69%
0%
4%
23
flagBelgium
23%
69%
0%
0%
13
flagUkraine
25%
64%
3%
3%
28
flagFrance
37%
62%
0%
0%
35
flagItaly
27%
62%
3%
6%
29
flagPoland
33%
54%
6%
3%
14014
flagthe Netherlands
28%
54%
15%
2%
46
flagCanada
27%
54%
6%
9%
33
flagthe United Kingdom
35%
53%
6%
3%
330
flagIndia
29%
53%
4%
5%
118
flagAustralia
39%
52%
0%
4%
23
flagGermany
31%
51%
6%
4%
202
flagNorway
29%
50%
8%
8%
34
flagthe United States
31%
48%
6%
7%
307
flagRepublic of Ireland
41%
45%
6%
2%
46
flagSweden
40%
45%
5%
10%
20
flagUnknown
37%
44%
9%
6%
586
flagCzech Republic
53%
38%
7%
0%
13
flagthe Philippines
50%
31%
13%
4%
22

Gender

men53%
women53%
15
32%
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...
740
51%

Details

Author: Kasia
Illustration: D. Sharon Pruitt
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