RRB NTPC CBT-1 previous year question
What should come in place of the ‘?’ in the given series? 8 6 9 23 87 ?
Asked in RRB NTPC 2026 — 15 June Shift 3 · Reasoning
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Correct answer: (B) 429
Each term follows the rule: multiply by increasing integers and subtract the next integer — 8×1-2=6, 6×2-3=9, 9×3-4=23, 23×4-5=87, so the next term = 87×5-6 = 429.
हिंदी में प्रश्न
दी गई श्रृंखला में “?' के स्थान पर क्या आएगा? 8 6 9 23 87 ?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) 429
प्रत्येक पद इस नियम का पालन करता है: बढ़ते हुए पूर्णांकों से गुणा करें और अगला पूर्णांक घटाएँ — 8×1-2=6, 6×2-3=9, 9×3-4=23, 23×4-5=87, अतः अगला पद = 87×5-6 = 429 है।
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