Multiple choice

Find the missing number in the following sequence. 1, 3, 5, 7, 11, ? , 17, 19

  1. 9

  2. 7

  3. 14

  4. 13

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The sequence is: 1, 3, 5, 7, 11, __, 17, 19. These are consecutive prime numbers. The missing prime between 11 and 17 is 13. Option A (9) and Option C (14) are not prime. Option B (7) is already present earlier in the sequence.