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Unit 5 · Mathematical Reasoning and Aptitude Paper 1 · 28 June 2025 Evening

Find the missing term (?) in the following alpha-numeric series.
A2B, B3D, C5F, (?), E11J, ......
निम्नलिखित अक्षर-अंक शृंखला में लुप्त पद (?) ज्ञात कीजिए।
A2B, B3D, C5F, (?), E11J, ......

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Show answer & explanation

Correct answer: A. D7H

Explanation

The first letters run A, B, C, D, E in order. The middle numbers are consecutive prime numbers 2, 3, 5, 7, 11. The last letters are the alternate letters B, D, F, H, J. So the fourth term must be D, 7, H, that is D7H.पहले अक्षर क्रमशः A, B, C, D, E हैं। बीच की संख्याएँ क्रमागत अभाज्य संख्याएँ 2, 3, 5, 7, 11 हैं। अंतिम अक्षर एकांतर क्रम में B, D, F, H, J हैं। अतः चौथा पद D, 7, H अर्थात् D7H होगा।

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