Asked in MDCAT Test Series 16 — Electromagnetism, Induction and Atomic Spectra (18 March 2025) 2025Moderate

In the following question, various terms of an alphabet sequence are given with one or more terms missing as shown by (?). Choose the missing term.WFB, TGD, QHG,?

Correct answer: B. NIK

  • A. NIJ
  • B. NIK
  • C. NJK
  • D. OIK

Explanation

To solve the sequence WFB, TGD, QHG, ?, analyze each letter separately:First letters:W (23) → T (20) → Q (17)Each letter decreases by 3, so the next is N (14).Second letters:F (6) → G (7) → H (8)Each letter increases by 1, so the next is I (9).Third letters:B (2) → D (4) → G (7)The increases follow a pattern of +2, +3, and +4, so the next increase is +4, leading to K (11).Conclusion:The missing term is NIK. While Option B correctly follows all identified patterns, the other options fail to do so, either in the first, second, or third letter adjustments.

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Series questions use numbers, letters, symbols or combinations arranged according to a hidden pattern. You may need to identify repeated operations, alternating rules, alphabetical positions, differences, reversals and mixed sequences to find a missing term or predict the next one.

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