Multiple choice

Which of the terms is incorrect in the following series? 1112, 1314, 1516, 1718, 1921, 2122, 2324

  1. 1516

  2. 1921

  3. 2122

  4. 2324
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B Correct answer
Explanation

The series is 1112, 1314, 1516, 1718, 1921, 2122, 2324. The pattern is concatenating two consecutive numbers (n, n+1). 1920 should be the term, not 1921.

AI explanation

The series is formed by concatenating consecutive odd and even numbers, increasing the pair by two ones in the tens and units places. The terms are formed as 11 with 12, 13 with 14, 15 with 16, 17 with 18, and 19 with 20. The term 1921 is incorrect because it breaks the consecutive even number sequence established by the logic.

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