IIT JEE Practice Question and Answer

Q: Sreya bought a plot for Rs. 6,00,000,  then sold half of the plot at 10 % profit and rest at 15% profit. What is the total profit % that Sreya gain? 1425 0

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    13.8 %
    Correct
    Wrong
  • 2
    11.4 %
    Correct
    Wrong
  • 3
    12.5 %
    Correct
    Wrong
  • 4
    14.5 %
    Correct
    Wrong
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Answer : 3. "12.5 %"
Explanation :

Answer: C) 12.5 % Explanation: 10% profit at half plot = 600000/2 x 10/100 = Rs. 30,000 15% profit at remaining half plot = 600000/2 x 15/100 = Rs. 45,000 Now, total profit = 30000 + 45000 = 75000 Profit % = 75000/600000 x 100 = 12.5 %

Q: A town has a population of 4000 requires 140 liters of water per head. It has a tank measuring 18m x 12m x 8m. The water of this tank will suffice for ____ days? 1494 0

  • 1
    3
    Correct
    Wrong
  • 2
    4
    Correct
    Wrong
  • 3
    5
    Correct
    Wrong
  • 4
    2
    Correct
    Wrong
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Answer : 1. "3"
Explanation :

Answer: A) 3 Explanation: Water required = 4000 x 140 = 560000 lit = 560 cu.m (1 cu.m = 1000 lit) Volume of tank = 18 x 12 x 8 = 1728 cu.m Water of this tank will suffice for = 1728/560 = 3 days.

Q: What is the currency of Singapore? 1568 0

  • 1
    Krone
    Correct
    Wrong
  • 2
    Dollar
    Correct
    Wrong
  • 3
    Tenge
    Correct
    Wrong
  • 4
    Pound
    Correct
    Wrong
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Answer : 2. "Dollar"
Explanation :

Answer: B) Dollar Explanation:

Q: Who will be awarded The Jnanpith Award for the year 2017? 1443 0

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    Krishna Sobti
    Correct
    Wrong
  • 2
    Vikas Singh
    Correct
    Wrong
  • 3
    Rohim Khan
    Correct
    Wrong
  • 4
    Sunita Verma
    Correct
    Wrong
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Answer : 1. "Krishna Sobti"
Explanation :

Answer: A) Krishna Sobti Explanation: Hindi writer Krishna Sobti has been chosen for this years Jnanpith Award for her contribution to Indian Literature. This is 53rd Jnanpith Award for India.

Q: According to Forbes, Who has become Asia’s richest person in the year 2017? 1281 0

  • 1
    Jeff Bezos
    Correct
    Wrong
  • 2
    Hui Ka Yan
    Correct
    Wrong
  • 3
    Mukesh Ambani
    Correct
    Wrong
  • 4
    Bill Gates
    Correct
    Wrong
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Answer : 3. "Mukesh Ambani"
Explanation :

Answer: C) Mukesh Ambani Explanation: Reliance Industries Chairman Mukesh Ambani overtook China’s Hui Ka Yan to become Asia’s richest person with a total wealth of $42.1 billion. According to Forbes’ real time billionaire’s list, Ambani's personal wealth rose by $466 million in 2017.

Q: If a girl cycles at 10 kmph, then she arrives at a certain place at 1 p.m. If she cycles at 15 kmph, she will arrive at the same place at 11 a.m. At what speed must she cycle to get there at noon? 1512 0

  • 1
    14 kmph
    Correct
    Wrong
  • 2
    13 kmph
    Correct
    Wrong
  • 3
    12 kmph
    Correct
    Wrong
  • 4
    11 kmph
    Correct
    Wrong
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Answer : 3. "12 kmph"
Explanation :

Answer: C) 12 kmph Explanation: The distance is constant in this case. Let the time taken for travel with a speed of 10 kmph be 't'. Now the speed of 15 kmph is 3/2 times the speed of 10 kmph. Therefore, time taken with the speed of 15 kmph will be 2t/3 (speed is inversely proportional to time) Extra time taken = t - 2t/3 = t/3 => 1pm - 11am = 2hrs => t/3 = 2h => t = 6 hrs. Now, Distance = speed x time = 10 x 6 = 60 kms Time he takes to reach at noon = 6 - 1 = 5 hrs Now, Speed = 60/5 = 12 kmph.

Q: If 10 men take 15 days to complete a work. In how many days will 37 men complete the work? 3048 0

  • 1
    3 days
    Correct
    Wrong
  • 2
    4 days
    Correct
    Wrong
  • 3
    5 days
    Correct
    Wrong
  • 4
    6 days
    Correct
    Wrong
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Answer : 2. "4 days"
Explanation :

Answer: B) 4 days Explanation: Given 10 men take 15 days to complete a work => Total mandays = 15 x 10 = 150 Let the work be 150 mandays. => Now 37 men can do 150 mandays in 150/37 =~ 4 days

Q: "The Law of Kepler" is related with which among the following ? 1182 0

  • 1
    Planetary Motion
    Correct
    Wrong
  • 2
    Law of Conservation of energy
    Correct
    Wrong
  • 3
    Law of Gravitation
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 1. "Planetary Motion"
Explanation :

Answer: A) Planetary Motion Explanation: Kepler's laws of planetary motion are three scientific laws describing the motion of planets around the Sun. Kepler’s three laws of planetary motion can be stated as follows: (1) All planets move about the Sun in elliptical orbits, having the Sun as one of the foci. (2) A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time. (3) The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the Sun.

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