2,5,11,17,...
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19
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21
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23
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25
Reveal answer
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C
Correct answer
Explanation
This is a prime number sequence: 2, 5, 11, 17, 23. These are consecutive prime numbers starting from 2. Prime numbers are numbers greater than 1 that are only divisible by 1 and themselves.
AI explanation
Looking at the differences between consecutive terms: 5-2=3, 11-5=6, 17-11=6, the gap settles into a steady +6 pattern, so the next term follows 17+6=23. This kind of sequence, where an initial irregular jump settles into a constant difference, is a common numerical-reasoning pattern.