RRB NTPC CBT-1 previous year question
Each vowel in the word NOTFERN is changed to the letter immediately following it in the English alphabetical order, and each consonant is changed to the letter immediately preceding it in the English alphabetical order. How many letters will appear exactly twice in the new group of letters thus formed?
Asked in RRB NTPC 2026 — 14 June Shift 3 · Reasoning
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Correct answer: (B) One
Shifting vowels forward and consonants backward in NOTFERN gives N->M, O->P, T->S, F->E, E->F, R->Q, N->M, forming MPSEFQM; the letter M appears exactly twice, so exactly one letter (M) appears twice.
हिंदी में प्रश्न
शब्द NOTFERN के प्रत्येक स्वर को अंग्रेजी वर्णमाला क्रम में उसके ठीक बाद वाले अक्षर से बदल दिया गया है और प्रत्येक व्यंजन को अंग्रेजी वर्णमाला क्रम म॑ उसके ठीक पहले वाले अक्षर से बदल दिया गया है। इस प्रकार बने अक्षरों के नए समूह में कितने अक्षर ठीक दो बार दिखाइ देंगे?
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सही उत्तर: (B) तीन
NOTFERN में स्वरों को आगे और व्यंजनों को पीछे खिसकाने पर N->M, O->P, T->S, F->E, E->F, R->Q, N->M मिलते हैं, जिससे MPSEFQM बनता है; अक्षर M ठीक दो बार आता है, इसलिए ठीक एक अक्षर (M) दो बार आता है।
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