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.
reach: rather globalmathematicstechnology
Answers by country
15
17
19
21
answers
France
19
the Netherlands
20
Australia
35
Germany
226
Greece
14
India
196
Switzerland
29
the United Kingdom
122
Canada
27
Malaysia
12
Ghana
10
Austria
39
Pakistan
15
Poland
13648
the United States
272
Republic of Ireland
21
Unknown
34
the Philippines
28