IIT JEE Practice Question and Answer

Q: How Many Hours Is 100 Miles? 1444 0

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Answer :
Explanation :

It depends on the speed with what you are travelling.   For example, if you have travelled 100 miles and it took 2.5 hours to do it, then that is 100 miles = 2.5 hrs for you. And the Average Speed is given by 100/2.5 = 40 miles per 1hour.

Q: Sweety is 54 years old and her mother is 80. How many years ago was Sweety's mother three times her age? 1444 0

  • 1
    20
    Correct
    Wrong
  • 2
    41
    Correct
    Wrong
  • 3
    26
    Correct
    Wrong
  • 4
    33
    Correct
    Wrong
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Answer : 2. "41"
Explanation :

Answer: B) 41 Explanation: Given P = 54 and M = 80 According to the question, Let ‘A’ years ago, M = 3P => M - A/P - A = 3 => 80 - A = 3(54 - A) => 80 - A = 162 - 3A => 2A = 82 => A = 41 Therefore, A = 41 years ago Sweety’s mother was 3 times of Sweety’s age. Hence, at the age S = 13 and M = 39.

Q: Manish completes a work in 20 days. After 8 days Sriram joined the work. In how many days will the work be completed  ? Statements : I. Sriram takes twice the time than Manish to complete the work.II. Sriram completes half the work in 15 days. 1443 0

  • 1
    Statement I alone is sufficient to answer the question
    Correct
    Wrong
  • 2
    Statement II alone is sufficient to answer the question
    Correct
    Wrong
  • 3
    Either the statements I & II is sufficient to answer the question
    Correct
    Wrong
  • 4
    Neither the statements I & II is sufficient to answer the question
    Correct
    Wrong
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Answer : 3. "Either the statements I & II is sufficient to answer the question"
Explanation :

Answer: C) Either the statements I & II is sufficient to answer the question Explanation: From statement I, Time taken by Sriram to complete the work = 40 days From statement II, Time taken by Sriram to complete the wok = 30 days So from both either by statement I or statement II we can find the time to complete the work.

Q: Is a mushroom an autotroph? 1443 0

  • 1
    TRUE
    Correct
    Wrong
  • 2
    FALSE
    Correct
    Wrong
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Answer : 2. "FALSE"
Explanation :

Answer: B) FALSE Explanation: Mushrooms are heterotrophs. They are not plants or autotrophs.   Every living thing that exists need energy in order to live. This energy ultimately comes from the sun, and only plants, or autotrophs, can directly use this energy to make food. Those organisms that cannot harness the sun's energy are known as heterotrophs.   Mushrooms belong to kingdom Fungi and are heterotrophs because they decompose and consume nutrients from the soil. They are not green so they cannot photosynthesize For this reason, mushrooms and all other fungi are heterotrophs.

Q: If the age of father is 4 years greater than the mother and 28 years greater than the son,then what is the age of the father? which one should be used to calculate the age ? 1443 0

  • 1
    mother/son = Non-prime number
    Correct
    Wrong
  • 2
    mother/son = Perfect square number A) only A alone is sufficient B) only B alone is sufficient
    Correct
    Wrong
  • 3
    both A and B are required
    Correct
    Wrong
  • 4
    A) only A alone is sufficient B) only B alone is sufficient C) both A and B are required D)
    Correct
    Wrong
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Answer : 2. "mother/son = Perfect square number A) only A alone is sufficient B) only B alone is sufficient"
Explanation :

Answer: B) only B alone is sufficient Explanation: For the given problem there are three possiblities.Father's age can be = 36, 31, 29Mother's age = 32, 27, 25Son's age = 8, 3, 1. By using only B it can be calculated.

Q: When was Judaism founded? 1443 0

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Answer :
Explanation :

Judaism is one of the oldest monotheistic religions and was founded over 3500 years ago in the Middle East.   Jews believe that God appointed the Jews to be his chosen people in order to set an example of holiness and ethical behaviour to the world.

Q: Currency of Peru is 1442 0

  • 1
    Chilean Peso
    Correct
    Wrong
  • 2
    Euro
    Correct
    Wrong
  • 3
    Sol
    Correct
    Wrong
  • 4
    Dollar
    Correct
    Wrong
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Answer : 3. "Sol"
Explanation :

Answer: C) Sol Explanation: Peru is a country in South America. Lima is the capital city of Peru. Sol is the currency of Peru.

Q: 16 of 225 is = 1442 0

  • 1
    7.11
    Correct
    Wrong
  • 2
    7.21
    Correct
    Wrong
  • 3
    6.87
    Correct
    Wrong
  • 4
    7.58
    Correct
    Wrong
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Answer : 1. "7.11"
Explanation :

Answer: A) 7.11 Explanation: 16 of 225 is =  16 = p × 225100p = 1600225 = 7.1111

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