IIT JEE Practice Question and Answer

Q: What is the 2017 theme of International Day for Biodiversity (IDB)  ? 1251 0

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    B)  ? A)
    Correct
    Wrong
  • 2
    ? A) Biodiversity and Sustainable Tourism B) Invasive Alien Species
    Correct
    Wrong
  • 3
    Biodiversity and Agriculture
    Correct
    Wrong
  • 4
    Convention on Biological Diversity
    Correct
    Wrong
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Answer : 1. "B)  ? A)"
Explanation :

Answer: A) Biodiversity and Sustainable Tourism Explanation: The International Day for Biological Diversity (IDB) is observed every year on May 22 to increase understanding and awareness of biodiversity issues. The 2017 theme “Biodiversity and Sustainable Tourism” provides an opportunity to raise awareness and action towards the important contribution of sustainable tourism both to economic growth and to the conservation and sustainable use of biodiversity.

Q: A lady took loan from a bank at the rate of 12% p.a. simple interest. After 3 years she had to pay Rs. 5400 interest only for the period. The principal amount borrowed by her was : 1246 0

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    Rs. 15,000
    Correct
    Wrong
  • 2
    Rs. 1,50,000
    Correct
    Wrong
  • 3
    Rs. 1500
    Correct
    Wrong
  • 4
    Rs. 1,62,000
    Correct
    Wrong
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Answer : 1. "Rs. 15,000"
Explanation :

Answer: A) Rs. 15,000 Explanation: Principal = Rs.(100 x 5400)/(12 x 3)= Rs. 15000.

Q: What is name of capital of MARSHALL ISLANDS ? 1244 0

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    Tunis
    Correct
    Wrong
  • 2
    Accra
    Correct
    Wrong
  • 3
    Tripoli
    Correct
    Wrong
  • 4
    Majuro
    Correct
    Wrong
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Answer : 2. "Accra"
Explanation :

Answer: B) Accra Explanation:

Q: What is 16 bit? 1244 0

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Answer :
Explanation :

Anything larger and the computer would need to break the number into smaller pieces.   16-bit is a computer hardware device or software program capable of transferring 16 bits of data at a time. Today, 16-bit hardware and software has been replaced by 32-bit and 64-bit alternatives, which give the computer more memory to work with; increasing overall performance.   For example, early computer processors (e.g., 8088 and 80286) were 16-bit processors, meaning they were capable of working with 16-bit binary numbers (decimal number up to 65,535).

Q: Who has won the Nobel prize in "Physics" for the year 2017 ? 1240 0

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    Barry Barish
    Correct
    Wrong
  • 2
    Kip Thorne
    Correct
    Wrong
  • 3
    Rainer Weiss
    Correct
    Wrong
  • 4
    All of the above
    Correct
    Wrong
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Answer : 4. "All of the above"
Explanation :

Answer: D) All of the above Explanation: Rainer Weiss, a professor at the Massachusetts Institute of Technology, and Kip Thorne and Barry Barish, both of the California Institute of Technology, were awarded the Nobel Prize in Physics for the discovery of ripples in space-time known as gravitational waves, which were predicted by Albert Einstein a century ago but had never been directly seen.

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Answer : 3. "Any two of (1, 2 & 3)"
Explanation :

Answer: C) Any two of (1, 2 & 3) Explanation: Using Both 1 & 2 statements we get the rate of interest as in (1) we have given principle amount and in (2) compound interest for 2 years. By this data we get the rate%. Using Both 1 & 3 statements we can get the rate% as we have principle amount & difference between compound interest and simple interest in 2 years. Using Both 2 & 3 statements we get compound interest & simple interest by which we get principle amount. So that we can calculate %rate. Hence by using any two of the three statements(1,2&3) we get rate of interest.

Q: How many minutes does a watch lose per day, if its hands coincide every 64 minutes ? 1236 0

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    36 7/9 min
    Correct
    Wrong
  • 2
    32 8/11 min
    Correct
    Wrong
  • 3
    34 3/11 min
    Correct
    Wrong
  • 4
    65 5/11 min
    Correct
    Wrong
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Answer : 2. "32 8/11 min"
Explanation :

Answer: B) 32 8/11 min Explanation: 55 min. spaces are covered in 60 min. 60 min. spaces are covered in min. = min. Loss in 64 min. = min. Loss in 24 hrs = min. = min.

Q: A can complete a piece of work in 12 days and B is 60% more efficient than A. In how many days B will complete the same work  ? 1236 0

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    8.7 hrs
    Correct
    Wrong
  • 2
    5.2 hrs
    Correct
    Wrong
  • 3
    5 hrs
    Correct
    Wrong
  • 4
    7.5 hrs
    Correct
    Wrong
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Answer : 4. "7.5 hrs"
Explanation :

Answer: D) 7.5 hrs Explanation: Ratio of times taken by A and B = 160 : 100A can do the work in 12 daysLet B can do the work in "D" days=> 160:100 = 12 : D=> D = 12 x 100/160 = 7.5 hrs

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