SSC GD Constable previous year question
A number is first reduced by 15% and then increased by 20%. The number so obtained is 78 more than the original number. Find the original number.
Asked in SSC GD Constable 2025: 04 Feb 2025 Shift 1 (Morning) · Quantitative Aptitude
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Correct answer: (D) 3900
Let number = x; 0.85x × 1.20 = 1.02x; 1.02x − x = 0.02x = 78 ⟹ x = 3900.
हिंदी में प्रश्न
एक संख्या को पहले 15% घटाया जाता है और फिर 20% बढ़ाया जाता है। इस प्रकार प्राप्त संख्या, मूल संख्या से 78 अधिक है। मूल संख्या ज्ञात कीजिए।
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सही उत्तर: (D) 3900
संख्या x मानें; 0.85x × 1.20 = 1.02x; 1.02x − x = 0.02x = 78 ⟹ x = 3900।
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