IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Find the next number in the series 265, 269, 278, 284, ? 1759 0

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    309
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    319
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  • 3
    298
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    गलत
  • 4
    415
    सही
    गलत
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उत्तर : 1. "309"
व्याख्या :

Answer: A) 309 Explanation: The pattern in the given series is +4, +9, +16, +25, ... i.e. 22,32,42,52... The next number is 284+25 = 309.

प्र: Economic resources are also called 1759 0

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उत्तर :
व्याख्या :

Economic resources include land, labour, capital and entrepreneurship.  Entrepreneurship is also considered an economic resource because individuals are responsible for creating businesses and moving economic resources in the business environment.   These economic resources are also called as Factors of production.

प्र: Light from the sun reaches us in nearly 1759 0

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    5 min
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    4.30 hrs
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    8 min
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    5.30 hrs
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उत्तर : 3. "8 min"
व्याख्या :

Answer: C) 8 min Explanation: The light from the sun takes about 8 minutes to reach the Earth after it has been emitted from the sun's surface.   The time it takes for light to reach planets in our Solar System varies from about 3 minutes for Mercury to about 5.3 hours for Pluto.

प्र: DRDO full form is 1758 0

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    Delhi Research and Development Organisation
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  • 2
    Defence Research and Deployment
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  • 3
    Delhi Rail Development Organisation
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    गलत
  • 4
    Defence Research and Development Organisation
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उत्तर : 4. "Defence Research and Development Organisation"
व्याख्या :

Answer: D) Defence Research and Development Organisation Explanation: DRDO stands for The Defence Research and Development Organisation.   The Defence Research and Development Organisation (DRDO) is an agency of the Republic of India, charged with the military's research and development, headquartered in New Delhi, India.

प्र: The term "simple carbohydrates" refers to 1758 0

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    polysaccharides
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    monosaccharides and disaccharides
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    starch and glycogen
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    dietary fiber
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उत्तर : 2. "monosaccharides and disaccharides"
व्याख्या :

Answer: B) monosaccharides and disaccharides Explanation: Simple carbohydrates are also called as Simple sugars. Monosaccharides and Disaccharides refers to simple carbohydrates.

प्र: The payment per hour for a daily-wages employee is increased by 33.33 and the working time is reduced by 33.33%. What is the percentage change in the employee's income ? 1758 0

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    11.11% decrease
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  • 2
    21.11% increase
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    11.11% increase
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  • 4
    21.11% decrease
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उत्तर : 1. "11.11% decrease"
व्याख्या :

Answer: A) 11.11% decrease Explanation: If earlier he is getting Rs. 1  per hr and working for 1 hr, income = Rs. 1Now he is getting Rs 1.3333 per hr and working for 0.66667 hrs Then income for 0.66667 hrs = Rs. 0.8889. If payment per hr is increased by 33.33 %  and working hours dereased by 33.33%, then 11.11 % decrease in income.

प्र: The mean of 100 observations is 40. It is found that an observation 84 was misread as 48. Then the correct mean is ? 1758 0

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    40.36
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    41.24
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    41.92
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  • 4
    42.05
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उत्तर : 1. "40.36"
व्याख्या :

Answer: A) 40.36 Explanation: Given, mean of 100 observations is 40 => Total of 100 observations = 40 x 100 = 4000 84 is misread as 48 => Difference = 84 - 48 = 36 => Now, new total of 100 observations = 4000 + 36 = 4036 Correct Mean = 4036/100 = 40.36

प्र: In a daily morning walk three persons step off together. their steps measure 75 cm, 80 cm and 85 cm respectively. What is the minimum distance each should walk so that thay can cover the distance in complete steps  ? 1758 0

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    222 m 44 cm
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  • 2
    204 m
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  • 3
    201 m 21 cm
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  • 4
    208 m
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उत्तर : 2. "204 m"
व्याख्या :

Answer: B) 204 m Explanation: To find the minimum distance, we have to get the LCM of 75, 80, 85 Now, LCM of 75, 80, 85 = 5 x 15 x 16 x 17 = 20400 Hence, the minimum distance each should walk so that thay can cover the distance in complete steps = 20400 cms = 20400/100 = 204 mts.

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