IIT JEE Practice Question and Answer

Q: A tank is filled in eight hours by three pipes K, L and M. Pipe K is twice as fast as pipe L, and L is twice as fast as M. How much time will pipe L alone take to fill the tank ? 1254 0

  • 1
    32 hrs
    Correct
    Wrong
  • 2
    24 hrs
    Correct
    Wrong
  • 3
    28 hrs
    Correct
    Wrong
  • 4
    26 hrs
    Correct
    Wrong
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Answer : 3. "28 hrs"
Explanation :

Answer: C) 28 hrs Explanation: 1/K + 1/L + 1/M = 1/8 (Given)Also given that K = 2L and L = 2M=> 1/2L + 1/L + 2/L = 1/8=> (1 + 2 + 4)/2L = 1/8=> 2L/7 = 8=> L = 28 hours.

Q: Which international Airport Ltd has bagged the National Award for 'Excellence' in Energy Management ? 1251 0

  • 1
    New Delhi
    Correct
    Wrong
  • 2
    Lucknow
    Correct
    Wrong
  • 3
    Hyderabad
    Correct
    Wrong
  • 4
    Mumbai
    Correct
    Wrong
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Answer : 3. "Hyderabad"
Explanation :

Answer: C) Hyderabad Explanation:

Q: A certain sum is invested at simple interest at 18% p.a. for two years instead of investing at 12% p.a. for the same time period. Therefore the interest received is more by Rs. 840. Find the sum  ? 1250 0

  • 1
    Rs. 5858
    Correct
    Wrong
  • 2
    Rs. 8800
    Correct
    Wrong
  • 3
    Rs. 7000
    Correct
    Wrong
  • 4
    Rs. 6350
    Correct
    Wrong
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Answer : 3. "Rs. 7000"
Explanation :

Answer: C) Rs. 7000 Explanation: Let the sum be Rs. S.(S x 18 x 2)/100 - (S x 12 x 2)/100 = 840 => 36S/100 - 24S/100 = 840 => 12S/100 = 840 => S = 7000.

Q: Two dice are rolled simultaneously. Find the probability of getting the sum of numbers on the on the two faces divisible by 3 or 4? 1250 0

  • 1
    3/7
    Correct
    Wrong
  • 2
    7/11
    Correct
    Wrong
  • 3
    5/9
    Correct
    Wrong
  • 4
    6/13
    Correct
    Wrong
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Answer : 3. "5/9"
Explanation :

Answer: C) 5/9 Explanation: Here n(S) = 6 x 6 = 36 E={(1,2),(1,5),(2,1),(2,4),(3,3),(3,6),(4,2),(4,5),(5,1),(5,4),(6,3) ,(6,6),(1,3),(2,2),(2,6),(3,1),(3,5), (4,4),(5,3),(6,2)} => n(E)=20 Required Probability n(P) = n(E)/n(S) = 20/36 = 5/9.

Q: Milk and water are mixed in a vessel A as 4:1 and in vessel B as 3:2. For vessel C, if one takes equal quantities from A and B, find the ratio of milk to water in C. 1249 0

  • 1
    1:9
    Correct
    Wrong
  • 2
    9:1
    Correct
    Wrong
  • 3
    3:7
    Correct
    Wrong
  • 4
    7:3
    Correct
    Wrong
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Answer : 4. "7:3"
Explanation :

Answer: D) 7:3 Explanation: Ratio of Milk and water in a vessel A is 4 : 1   Ratio of Milk and water in a vessel B is 3 : 2   Ratio of only milk in vessel A = 4 : 5   Ratio of only milk in vessel B = 3 : 5   Let 'x' be the quantity of milk in vessel C   Now as equal quantities are taken out from both vessels A & B   => 4/5     :     3/5               x   3/5-x          x - 4/5   => 35-xx-45 = 11 (equal quantities)   => x = 7/10   Therefore, quantity of milk in vessel C  = 7   => Water quantity = 10 - 7 = 3   Hence the ratio of milk & water in vessel 3 is 7 : 3

Q: Who has become First Hindu to be a Pakistan Cabinet Minister in 20 years ? 1249 0

  • 1
    Parash Kumar
    Correct
    Wrong
  • 2
    Raghav Verma
    Correct
    Wrong
  • 3
    Darshan Lal
    Correct
    Wrong
  • 4
    Manik Patel
    Correct
    Wrong
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Answer : 3. "Darshan Lal"
Explanation :

Answer: C) Darshan Lal Explanation: After a span of 20 years, a Hindu politician, Darshan Lal, is set to take the role of a cabinet minister in Pakistan.  The new Prime Minister Shahaid Khaqan Abbasi formulated his cabinet and has appointed 65-year old Lal to lead coordination between four Pakistan provinces. Lal reportedly used to practice as a doctor in Mirpur Mathelo town in Ghotki district of Sindh province.

Q: What do you do to improve your knowledge? 1248 0

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Answer :
Explanation :

When an interviewer asks "What do you do to improve your knowledge", because it reflects the major thought process of a person and the way a person gains knowledge and the level to which one is accustomed to the current happenings in the world. In my sense knowledge is not very much obtained through books or any websites. We can give some exercise to the brain so that we can gain knowledge. It is essential to update oneself in order to cope up with this competitive world. First of all you should keep yourself updated with the new technological developments so that if the interviewer asks something concerning the current affairs, you can answer them.You can say that you visit various forums, blogs to keep yourself updated and improve your knowledge. It will be helpful if you have experience of such forums or blogs from before so that you can create a better impression in the minds of the interviewers. It is said that interacting with people of different ages, different communities and different education levels a person can fetch huge knowledge.

Q: Name the two Indian companies that have been named in the list of world's most ethical companies by American think tank Ethisphere Institute. 1247 0

  • 1
    Dabur and Tata
    Correct
    Wrong
  • 2
    Mahindra and Tata
    Correct
    Wrong
  • 3
    Patanjali and Dabur
    Correct
    Wrong
  • 4
    Tata Steel and Wipro
    Correct
    Wrong
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Answer : 4. "Tata Steel and Wipro"
Explanation :

Answer: D) Tata Steel and Wipro Explanation: Two Indian companies, Tata SteelBSE and Wipro have been named in the list of world’s most ethical companies by American think tank Ethisphere Institute. Ethisphere honors those companies who recognize their role in society to influence and drive positive change in the business community and organizations around the world. In 2017, 124 honorees were spanning five continents, 19 countries, and 52 industry sectors. Wipro is one of the two information technology companies named in the list, the other being Xerox Corporation.

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