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In a series 2, 3, 5, 7, 11, 13, ?, the next prime is

A15
B21
C19
D17
Answer & Solution
Correct answer: D. 17
1. List of primes: 2, 3, 5, 7, 11, 13 are first six primes. 2. The next integer after 13 to test is 14, 15, 16: composites. 3. Test 17: only divisible by 1 and 17, so 17 is prime. 4. So next term is 17. _Source: ICAI BoS Foundation Paper 3, Ch 9 'Series', p.5_
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