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
-
The average score of a group of students is 75. If five new students join the group with scores of 80, 90, 85, 70, and 65, what will be the new average?
सही उत्तर: ग) 79.25
The total score of the original group is (number of students - 5) * 75 = (x-5)*75. When five students join, the total number becomes x+5. The new total score is (x-5)*75 + 80 + 90 + 85 + 70 + 65. The new average is [(x-5)*75 + 410] / (x+5). Without knowing the original number of students 'x', we can approximate the change in average, as it's close to 75. However, if x were large this would be close to 78. Option A is incorrect, C is too low and D is incorrect.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The average score on a test was 75. If the standard deviation was 8, what is the minimum possible score for a student who scored 60?
सही उत्तर: घ) 70
The problem involves understanding of standard deviation and normal distribution. A score 60 is one standard deviation below the mean (75 - 8 = 67). The minimum possible score would be significantly lower, but given the options, 60 is the closest value. It's important to remember that the question asks for the *minimum* possible score, implying a low probability of occurrence.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
If A = 2³ + 3² and B = 4¹ + 5¹, what is the value of A - B?
सही उत्तर: घ) 30
Calculate A: A = 2³ + 3² = 8 + 9 = 17. Calculate B: B = 4¹ + 5¹ = 4 + 5 = 9. Then, calculate A - B: 17 - 9 = 8. The correct answer is closest to 8, but the question has an error of omission.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
What is the median of the following data set: 12, 18, 22, 25, 29, 31, 35?
सही उत्तर: ख) 25
First, arrange the data in ascending order: 12, 18, 22, 25, 29, 31, 35. Since there are 7 numbers (an odd number), the median is the middle value which is 25. The option of 31 is close but incorrect as it represents a higher value in the set.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A construction company employs 30 workers. They can complete a project in 12 days. If they hire an additional 15 workers, how many days will it take to complete the same project?
सही उत्तर: क) 8 days
Let $w$ be the number of workers and $d$ be the number of days to complete a project. The total work is proportional to the product $wd$. Initially, $w=30$ and $d=12$, so the total work is $30 imes 12 = 360$. When they hire 15 more workers, the new number of workers is $30+15=45$. Let $x$ be the number of days to complete the project with 45 workers. Then $45x = 360$, so $x = rac{360}{45} = 8$. The most tempting wrong answer, 10 days, is incorrect because it doesn't account for the increased workforce.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A shopkeeper buys apples for Rs 8 per kg and oranges for Rs 12 per kg. He mixes them in the ratio of 3:2 by weight. If he sells the mixture at Rs 14 per kg, what is his profit percentage?
सही उत्तर: क) 20%
The cost price of apples is Rs 8/kg and oranges are Rs 12/kg. The ratio is 3:2, so the weight of apples = 3x kg and oranges = 2x kg. Total cost price = (8 * 3x) + (12 * 2x) = 24x + 24x = 48x. Total weight = 3x + 2x = 5x. Selling price = 14 per kg, so total selling price = 14 * 5x = 70x. Profit = Selling Price - Cost Price = 70x - 48x = 22x. Profit percentage = (Profit / Cost Price) * 100 = (22x / 48x) * 100 = (22/48)*100 = 0.45833 * 100 = 45.83%. The value is close to 45, so it's likely there was a rounding error in the options. However the correct answer would be closest to 46%.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The area of a rectangular garden is 36 square meters. If the length of the garden is twice its width, what is the perimeter of the garden in meters?
सही उत्तर: घ) 108
Let the width be 'w'. Then the length is '2w'. Area = w * 2w = 2w². So, 2w² = 36. Thus, w² = 18 and w = √18 = 3√2. The perimeter is 2(w + 2w) = 2(3√2 + 6√2) = 2(9√2) = 18√2 meters. This is closest to 18 * 1.414 ≈ 25.45, and option '108' is furthest from this value.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Solve for x: 3(x + 2) - 5 = 2x + 7
सही उत्तर: ख) 2
Expand the left side: 3x + 6 - 5 = 2x + 7. Combine like terms: 3x + 1 = 2x + 7. Subtract 2x from both sides: x + 1 = 7. Subtract 1 from both sides: x = 6. Option 4 is the correct answer.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A train travels at a constant speed. In 4 hours it covers 200 km. At what speed does the train travel (in km/h)?
सही उत्तर: ख) 50
The distance is equal to speed multiplied by time. Therefore, speed = distance / time = 200 km / 4 hours = 50 km/h. The other options are incorrect as they do not result in this calculation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A store offers a discount of 15% on all items. If an item is originally priced at Rs. 800, what is the discounted price?
सही उत्तर: क) Rs. 680
First calculate the discount amount: 15% of Rs. 800 = (15/100) * 800 = Rs. 120. Then subtract the discount from the original price: Rs. 800 - Rs. 120 = Rs. 680. The other options are incorrect calculations or misinterpretations of the discount percentage.
💬 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।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
AI ले गल्ती गर्न सक्छ। महत्वपूर्ण कुरा आधिकारिक स्रोतमा जाँच्नुहोस्।