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
flagBelgium
23%
69%
0%
0%
13
flagSpain
28%
64%
0%
0%
14
flagItaly
27%
63%
4%
4%
22
flagCanada
31%
59%
4%
0%
22
flagFrance
43%
56%
0%
0%
23
flagthe Netherlands
22%
55%
18%
3%
27
flagNorway
29%
55%
3%
7%
27
flagPoland
35%
53%
5%
3%
9221
flagGermany
33%
53%
4%
4%
141
flagDenmark
40%
50%
10%
0%
10
flagthe United Kingdom
39%
49%
6%
3%
205
flagIndia
30%
49%
6%
6%
73
flagthe United States
32%
47%
7%
6%
236
flagAustralia
47%
47%
0%
0%
17
flagRepublic of Ireland
45%
45%
5%
0%
35
flagCzech Republic
50%
40%
10%
0%
10
flagUkraine
54%
36%
0%
9%
11
flagthe Philippines
64%
21%
14%
0%
14

Gender

men57%
women52%
15
31%
38%
17
57%
52%
19
6%
5%
21
4%
3%

Language versions

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answers
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What is the next number in the sequence? 2,3,5,7,11,13...
491
49%

Details

Author: Kasia
Illustration: D. Sharon Pruitt
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