अमेरिकी विश्वविद्यालय प्रवेश परीक्षा SAT, GRE र GMAT तयारी
अमेरिकी विश्वविद्यालय प्रवेश परीक्षा – SAT, GRE र GMAT
SAT / GRE / GMAT · SAT / GRE / GMAT
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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When a positive integer n is divided by 6, the remainder is 5. What is the remainder when 2n is divided by 6?
सही उत्तर: घ) 4
n = 6k + 5, so 2n = 12k + 10 = 6(2k+1) + 4, remainder 4. Doubling the remainder to 10 is not valid because 10 exceeds the divisor.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is the units digit of 7^23?
सही उत्तर: ग) 3
Units digits of powers of 7 cycle 7, 9, 3, 1 with period 4. 23 = 4·5 + 3, so the units digit is the 3rd in the cycle: 3.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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How many prime numbers are there between 20 and 40?
सही उत्तर: ख) 4
The primes are 23, 29, 31 and 37. 21, 27, 33 and 39 are odd but divisible by 3, and 35 is divisible by 5.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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How many positive divisors does 72 have?
सही उत्तर: क) 12
72 = 2³·3², so the number of divisors is (3+1)(2+1) = 12. Adding exponents instead of multiplying (3+2) leads to wrong counts.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is the least common multiple of 12, 18 and 30?
सही उत्तर: घ) 180
Take the highest power of each prime: 2²·3²·5 = 180. 360 is a common multiple but not the least.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is the greatest common divisor (HCF) of 84 and 126?
सही उत्तर: ग) 42
84 = 2²·3·7 and 126 = 2·3²·7; the common part is 2·3·7 = 42. 252 is the LCM, not the HCF.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is 7 ÷ 0.25?
सही उत्तर: ख) 28
Dividing by 0.25 is the same as multiplying by 4, so 7 × 4 = 28. 1.75 is 7 × 0.25, the reverse operation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is √0.0144?
सही उत्तर: क) 0.12
0.12² = 0.0144. A useful check: the square root of a number with four decimal places has two decimal places, so 0.012 (three places) is wrong.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following fractions is the greatest?
सही उत्तर: घ) 2/3
In decimals: 2/3 ≈ 0.667, 5/8 = 0.625, 3/5 = 0.6, 4/7 ≈ 0.571. Cross-multiplying 2/3 vs 5/8 gives 16 > 15, confirming 2/3 is larger.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is 30% of 40% of 500?
सही उत्तर: ग) 60
40% of 500 = 200, and 30% of 200 = 60 (equivalently 0.3 × 0.4 × 500). 70% of 500 would wrongly add the percents.
💬 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।
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