RRB NTPC CBT-1 previous year question
If 1 is added to each odd digit and 2 is subtracted from each even digit in the number 4317856, how many digits will appear more than once in the new number thus formed?
Asked in RRB NTPC 2026 — 18 June Shift 3 · Reasoning
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Correct answer: (A) Three
Adding 1 to each odd digit and subtracting 2 from each even digit in 4317856 gives 2,4,2,8,6,6,4. The digits 2, 4 and 6 each appear twice, so three distinct digits appear more than once.
हिंदी में प्रश्न
यदि संख्या 4317856 के प्रत्येक विषम अंक में 1 जोड़ दिया जाए और प्रत्येक सम अंक में से 2 घटा दिया जाए, तो इस प्रकार बनी Ag संख्या में कितने अंक एक से अधिक बार आएंगे?
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सही उत्तर: (A) एक
4317856 में प्रत्येक विषम अंक में 1 जोड़ने और प्रत्येक सम अंक से 2 घटाने पर 2,4,2,8,6,6,4 मिलता है। अंक 2, 4 और 6 प्रत्येक दो बार आते हैं, अतः तीन अलग-अलग अंक एक से अधिक बार आते हैं।
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