Quant र Reasoning (SAT/GRE/GMAT) – Quant & Reasoning MCQ
Quant र Reasoning (SAT/GRE/GMAT) – English Test
Quant & Reasoning · English Proficiency & SAT/GRE/GMAT · ४०८ प्रश्न
४०८ प्रश्न उपलब्ध। मोड छान्नुहोस्:
Quant र Reasoning (SAT/GRE/GMAT): प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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In a class, 60% of the students are girls. If 30 students are boys, how many students are in the class?
सही उत्तर: क) 75
Boys are 40% of the class: 0.4N = 30 → N = 75. 50 wrongly treats 30 boys as 60%.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A rectangle's length is 4 more than its width, and its perimeter is 40. What is its area?
सही उत्तर: घ) 96
2(w + w + 4) = 40 → w = 8, length = 12, area = 96. 100 would be a 10 × 10 square with the same perimeter.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Pens cost $3 each and notebooks $5 each. A student buys 10 items for $38. How many notebooks were bought?
सही उत्तर: ग) 4
p + n = 10 and 3p + 5n = 38 → 30 + 2n = 38 → n = 4 (and 6 pens). Answering 6 gives the number of pens.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A student scored 70, 85 and 90 on three tests. What score on the fourth test gives an average of 85?
सही उत्तर: ख) 95
Required total = 4 × 85 = 340; current total = 245; needed = 95.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The average of 6 numbers is 15. When one number is removed, the average of the rest becomes 14. What number was removed?
सही उत्तर: क) 20
Total of 6 = 90; total of remaining 5 = 70; removed number = 20. 1 is just the difference between the averages.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A father is 3 times as old as his son. In 12 years he will be twice as old as his son. How old is the son now?
सही उत्तर: घ) 12
Let son = s: 3s + 12 = 2(s + 12) → s = 12. 36 is the father's current age.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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How many litres of a 40% acid solution must be mixed with 10 litres of a 10% acid solution to obtain a 20% solution?
सही उत्तर: ग) 5 litres
0.4x + 1 = 0.2(x + 10) gives 0.2x = 1, so x = 5. 10 litres would produce a 25% solution (the midpoint), since equal volumes average the concentrations.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A mixture of 20 litres contains milk and water in the ratio 3 : 1. How much water must be added to make the ratio 3 : 2?
सही उत्तर: ख) 5 litres
Milk = 15 L, water = 5 L. For 15 : w = 3 : 2, w = 10 L, so 5 L must be added. 10 L is the final amount of water, not the amount added.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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8 workers can build a wall in 15 days. How many days would 12 workers take, working at the same rate?
सही उत्तर: क) 10 days
Total work = 8 × 15 = 120 worker-days; 120/12 = 10 days. 22.5 days wrongly assumes more workers take longer (direct instead of inverse proportion).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A pipe fills a tank in 4 hours and a drain empties it in 6 hours. If both are open, how long does it take to fill the empty tank?
सही उत्तर: घ) 12 hours
Net rate = 1/4 − 1/6 = 1/12 tank per hour, so 12 hours. 2.4 hours is the result of adding the rates, as if both were filling.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
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