IIT JEE Practice Question and Answer

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

  • 1
    309
    Correct
    Wrong
  • 2
    319
    Correct
    Wrong
  • 3
    298
    Correct
    Wrong
  • 4
    415
    Correct
    Wrong
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Answer : 1. "309"
Explanation :

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.

Q: Economic resources are also called 1759 0

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Answer :
Explanation :

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.

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

  • 1
    5 min
    Correct
    Wrong
  • 2
    4.30 hrs
    Correct
    Wrong
  • 3
    8 min
    Correct
    Wrong
  • 4
    5.30 hrs
    Correct
    Wrong
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Answer : 3. "8 min"
Explanation :

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.

Q: DRDO full form is 1758 0

  • 1
    Delhi Research and Development Organisation
    Correct
    Wrong
  • 2
    Defence Research and Deployment
    Correct
    Wrong
  • 3
    Delhi Rail Development Organisation
    Correct
    Wrong
  • 4
    Defence Research and Development Organisation
    Correct
    Wrong
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Answer : 4. "Defence Research and Development Organisation"
Explanation :

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.

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

  • 1
    polysaccharides
    Correct
    Wrong
  • 2
    monosaccharides and disaccharides
    Correct
    Wrong
  • 3
    starch and glycogen
    Correct
    Wrong
  • 4
    dietary fiber
    Correct
    Wrong
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Answer : 2. "monosaccharides and disaccharides"
Explanation :

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

Q: 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

  • 1
    11.11% decrease
    Correct
    Wrong
  • 2
    21.11% increase
    Correct
    Wrong
  • 3
    11.11% increase
    Correct
    Wrong
  • 4
    21.11% decrease
    Correct
    Wrong
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Answer : 1. "11.11% decrease"
Explanation :

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.

Q: 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

  • 1
    40.36
    Correct
    Wrong
  • 2
    41.24
    Correct
    Wrong
  • 3
    41.92
    Correct
    Wrong
  • 4
    42.05
    Correct
    Wrong
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Answer : 1. "40.36"
Explanation :

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

Q: 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

  • 1
    222 m 44 cm
    Correct
    Wrong
  • 2
    204 m
    Correct
    Wrong
  • 3
    201 m 21 cm
    Correct
    Wrong
  • 4
    208 m
    Correct
    Wrong
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Answer : 2. "204 m"
Explanation :

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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