Multiple choice

Directions: Find the wrong term in the series. 13, 19, 25, 31, 37, 43, 50, 55

  1. 25

  2. 31

  3. 50

  4. 55
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C Correct answer
Explanation

The series increases by 6 each time: 13, 19, 25, 31, 37, 43, 49, 55. The term 50 is incorrect as it should be 49.

AI explanation

The sequence follows a pattern of adding consecutive prime numbers. The difference between 13 and 19 is 6, which is not a prime number, but 19 minus 13 should be 5 based on the prime sequence of 5, 7, 11, 13, 17, and 19. Adding these primes: 13 + 5 = 18, 18 + 7 = 25, 25 + 11 = 36, 36 + 13 = 49, and 49 + 17 = 66. Following the established prime difference pattern, the number 50 is the wrong term.

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