AP Police SI previous year question
Number of key-presses to type first 300 natural numbers is
Asked in AP Police SI Prelims: 2018 (Paper I & II) · Quantitative Aptitude
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Correct answer: (A) 792
1–9: 9×1=9. 10–99: 90×2=180. 100–300: 201×3=603. Total = 9+180+603 = 792.
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हिंदी में प्रश्न
पहली 300 प्राकृत संख्याओं को टाइप करने के लिए कुल कुंजी-दबाव (की-प्रेस) की संख्या है
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 792
1–9: 9×1=9। 10–99: 90×2=180। 100–300: 201×3=603। कुल = 9+180+603 = 792।
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