Multiple choice

Directions: In the following question, the numbers/letters are arranged in a sequence based on a certain principle. Select the answer from the four alternatives given under the sequence for the term marked by '?'. 19, 24, 31, 42, 55, 72, ?

  1. 83

  2. 89

  3. 91

  4. 93
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The differences between consecutive terms are: 24-19=5, 31-24=7, 42-31=11, 55-42=13, 72-55=17. These are consecutive prime numbers. The next prime after 17 is 19. So, 72 + 19 = 91.

Keep practicing — related questions