अंग्रेजी भाषा दक्षता परीक्षा IELTS, PTE, TOEFL र Duolingo तयारी
अंग्रेजी भाषा दक्षता परीक्षा – IELTS, PTE, TOEFL र Duolingo
IELTS / PTE / TOEFL / Duolingo · IELTS / PTE / TOEFL / Duolingo
२,३३० प्रश्न उपलब्ध। मोड छान्नुहोस्:
English Test: 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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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)
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Two trains 200 km apart travel toward each other at 60 km/h and 40 km/h. After how long will they meet?
सही उत्तर: ग) 2 hours
Moving toward each other, their speeds add: 100 km/h. Time = 200/100 = 2 hours. 10 hours uses the difference of speeds, which applies only when moving in the same direction.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A cyclist rides to a town at 20 km/h and returns along the same route at 30 km/h. What is the average speed for the whole trip?
सही उत्तर: ख) 24 km/h
For equal distances, average speed = 2ab/(a + b) = 2(20)(30)/50 = 24 km/h. 25 km/h is the simple average of the speeds, which is wrong because more time is spent at the slower speed.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If x/y = 3/4 and y/z = 2/5, what is x/z?
सही उत्तर: क) 3/10
x/z = (x/y)(y/z) = (3/4)(2/5) = 6/20 = 3/10. 15/8 divides the ratios instead of multiplying them.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If y varies inversely with x, and y = 12 when x = 3, what is y when x = 9?
सही उत्तर: घ) 4
Inverse variation: xy is constant = 36, so y = 36/9 = 4. 36 would assume direct variation (y triples as x triples).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If y varies directly with x, and y = 15 when x = 5, what is y when x = 8?
सही उत्तर: ग) 24
y = kx with k = 15/5 = 3, so y = 3 × 8 = 24. 18 wrongly adds the change in x (3) to y; in direct variation it is the ratio y/x that stays constant.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A number is increased by 7 and the result is tripled, giving 48. What is the number?
सही उत्तर: ख) 9
3(n + 7) = 48 → n + 7 = 16 → n = 9. 16 is the value of n + 7, not n.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The sum of three consecutive integers is 72. What is the largest of them?
सही उत्तर: क) 25
n + (n+1) + (n+2) = 72 gives n = 23, so the integers are 23, 24, 25. 24 is the middle (the average), not the largest.
💬 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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