RRB NTPC CBT-1 previous year question
Each of the digits in the number 5421389 is arranged in ascending order from left to right. The position(s) of how many digits will remain unchanged as compared to that in the original number?
Asked in RRB NTPC 2026 — 16 June Shift 1 · Reasoning
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Correct answer: (C) TWO
Arranging the digits of 5421389 (5,4,2,1,3,8,9) ascending gives 1234589. Comparing with the original digit by digit, the 6th digit (8) and 7th digit (9) remain in the same position, so two positions are unchanged.
हिंदी में प्रश्न
यदि संख्या 5421389 के प्रत्येक अंक को बाएं से ae आरोही क्रम में व्यवस्थित किया जाए, तो मूल संख्या को तुलना में कितने अंकों का स्थान अपरिवर्तित रहेगा?
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उत्तर और व्याख्या देखें
सही उत्तर: (C) दो
5421389 (5,4,2,1,3,8,9) के अंकों को आरोही क्रम में व्यवस्थित करने पर 1234589 बनता है। मूल संख्या से अंक-दर-अंक तुलना करने पर, 6वां अंक (8) और 7वां अंक (9) अपने मूल स्थान पर ही रहते हैं, अतः दो स्थान अपरिवर्तित हैं।
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