IIT JEE Practice Question and Answer

Q: In a 100 litre of mixture the ratio of milk and water is 6:4. How much milk must be added to the mixture in order to make the ratio 3 : 1? 1819 0

  • 1
    85
    Correct
    Wrong
  • 2
    60
    Correct
    Wrong
  • 3
    55
    Correct
    Wrong
  • 4
    45
    Correct
    Wrong
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Answer : 2. "60"
Explanation :

Answer: B) 60 Explanation: Let M litres milk be added => 60 + M40 = 31 => 60 + M = 120 => M = 60 lit.

Q: Which state government has launched “Mahaswayam portal” for job seekers and employers  ? 1819 0

  • 1
    Andhra Pradesh
    Correct
    Wrong
  • 2
    Assam
    Correct
    Wrong
  • 3
    Telangana
    Correct
    Wrong
  • 4
    Maharashtra
    Correct
    Wrong
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Answer : 4. "Maharashtra"
Explanation :

Answer: D) Maharashtra Explanation: The Chief Minister of Maharashtra Devendra Fadnavis has recently launched a web portal ‘Mahaswayam’ for job seekers, employers, entrepreneurs and training institutes. At ‘Mahaswayam’, job seekers will be able to register themselves, search as well as apply for jobs, inquire for training, get information on self-employment and get details of job fairs. Besides, training institutes can also register, get details on participation in the state skill development programme, get training fee receipts, and can also receive training fee through ECS. Apart from this, entrepreneurs can also post job vacancy advertisements at the portal.

Q: 12 students of class IX took part in GK quiz. If the number of boys is 4 more than the number of girls. Find the number of boys and girls took part in the quiz ? 1818 0

  • 1
    7, 5
    Correct
    Wrong
  • 2
    9, 3
    Correct
    Wrong
  • 3
    8, 4
    Correct
    Wrong
  • 4
    6, 6
    Correct
    Wrong
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Answer : 3. "8, 4"
Explanation :

Answer: C) 8, 4 Explanation: Let the number of girls = x => x + x + 4 = 12 => 2x = 8 => x = 4 => Number of girls = 4 => Number of boys = 4 + 4 = 8

Q: Find the odd one out of the group ? 1818 0

  • 1
    708
    Correct
    Wrong
  • 2
    392
    Correct
    Wrong
  • 3
    618
    Correct
    Wrong
  • 4
    816
    Correct
    Wrong
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Answer : 2. "392"
Explanation :

Answer: B) 392 Explanation: The sum of the digits in 708, 618 and 816 is 15, but not in 392.

Q: A can do a piece of work in 30 days. He works at it for 6 days and then B finishes it in 18 days. In what time can A and B together it ? 1818 0

  • 1
    14 1/2 days
    Correct
    Wrong
  • 2
    11 days
    Correct
    Wrong
  • 3
    13 1/4 days
    Correct
    Wrong
  • 4
    12 6/7 days
    Correct
    Wrong
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Answer : 4. "12 6/7 days"
Explanation :

Answer: D) 12 6/7 days Explanation: Let 'B' alone can do the work in 'x' days 6/30 + 18/x = 1 => x = 22.5   1/30 + 1/22.5 = 7/90  => 90/7 = 12 6/7 days

Q: A word i know, six letters it contains, subtract just one and twelve remains. What is it? 1818 0

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Answer :
Explanation :

DOZENS. If we remove 'S' from it, it is DOZEN which tells that 12.

Q: India is the largest producer of 1818 0

  • 1
    Cotton
    Correct
    Wrong
  • 2
    Milk
    Correct
    Wrong
  • 3
    Mangoes
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 4. "All the above"
Explanation :

Answer: D) All the above Explanation: As per the latest updates, India is :   Largest producer of milk. Largest producer of millets in the world. Largest producer of jute. Largest producer of ginger. Largest producer of bananas. Largest producer of castor oil seeds. Largest producer of mangoes. Largest producer of safflower oil seeds. Largest producer of papayas. Largest producer of cottonseed (As per International Cotton Advisory Committee (ICAC) report for the month of March 2017)   Second largest producer of tea, the first position being held by China. Second largest producer of sugarcane, the first position being held by Brazil. Second largest producer of wheat, the first position being held by China. Second largest producer of onions, the first position being held by China. Second largest producer of potatoes, the first position being held by China. Second largest producer of garlic, the first position being held by China. Second largest producer of rice, the first position being held by China. Second largest producer of cement., next to China. Second largest producer of silk, the first position being held by China.

Q: Four person A, B, C and D. The sum of their present age is 176. Four years ago ratio of their age was 11: 9 : 6 : 14, then find who is eldest and youngest among them ? 1817 0

  • 1
    A is eldest & C is youngest
    Correct
    Wrong
  • 2
    D is eldest & C is youngest
    Correct
    Wrong
  • 3
    C is eldest & A is youngest
    Correct
    Wrong
  • 4
    A is eldest & B is youngest
    Correct
    Wrong
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Answer : 2. "D is eldest & C is youngest"
Explanation :

Answer: B) D is eldest & C is youngest Explanation: Given sum of present ages of A, B, C & D A + B + C + D = 176 and also given that, (A-4) : (B-4) : (C-4) : (D-4) = 11 : 9 : 6 : 14 Let the ratio = x => A-4 + B-4 + C-4 + D-4 = 11x + 9x + 6x + 14x => (A + B + C + D ) - 16 = 40x => 176 - 16 = 40x => x = 4 => A = 44 + 4 = 48 => B = 40 => C = 28 => D = 60 Therefore, from the above conclusions D is eldest with 60 years and C is youngest with 28 years of ages.

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