IIT JEE Practice Question and Answer

Q: Express 0.875 and 0.375 as a Fraction. 1471 0

  • 1
    3/11 & 7/11
    Correct
    Wrong
  • 2
    7/9 & 9/13
    Correct
    Wrong
  • 3
    7/8 & 3/8
    Correct
    Wrong
  • 4
    7/9 & 9/11
    Correct
    Wrong
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Answer : 3. "7/8 & 3/8"
Explanation :

Answer: C) 7/8 & 3/8 Explanation: Given 0.875 and 0.375 0.875 :: After decimal point there are 3 digits 875 Now, mutiply and divide 0.875 with 1000 0.875 x 10001000 = 8751000 Now, this can be reduced to fraction 78Therefore, 0.875 as fraction = 78 Similarly, 0.375 ::  After decimal point there are 3 digits 375 Now, mutiply and divide 0.375 with 1000 0.375 x 10001000 = 3751000Now, this can be reduced to fraction 38Therefore, 0.375 as fraction = 38

Q: Who became the first wicketkeeper in world cricket to effect 100 stumpings in ODI's in 2017 ? 1470 0

  • 1
    Mahendra Singh Dhoni
    Correct
    Wrong
  • 2
    Kumar Sangakkara
    Correct
    Wrong
  • 3
    Mark Boucher
    Correct
    Wrong
  • 4
    Adam Gilchrist
    Correct
    Wrong
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Answer : 1. "Mahendra Singh Dhoni"
Explanation :

Answer: A) Mahendra Singh Dhoni Explanation: Former India captain Mahendra Singh Dhoni became the first wicketkeeper in world cricket to effect 100 stumpings in One Day Internationals. He broke the record of former Sri Lankan captain Kumar Sangakkara.

Q: The sum of the ages of 5 children born at the intervals of 3 years each is 50 years. What is the age og the youngest child ? 1470 0

  • 1
    8 yrs
    Correct
    Wrong
  • 2
    16 yrs
    Correct
    Wrong
  • 3
    6 yrs
    Correct
    Wrong
  • 4
    4 yrs
    Correct
    Wrong
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Answer : 4. "4 yrs"
Explanation :

Answer: D) 4 yrs Explanation: Let the age of the youngest child is 'X' years.Then the child elder than the yongest is 'X + 3' yrsSince each have 3yrs difference upto 5 childrenAnd given that=> X + X+3 + X+6 + X+9 + X+12 = 50=> 5X + 30 = 50=> X = 4 yrs.

Q: Is air homogeneous or heterogeneous? 1470 0

  • 1
    homogeneous
    Correct
    Wrong
  • 2
    heterogeneous
    Correct
    Wrong
  • 3
    Both A & B
    Correct
    Wrong
  • 4
    None of the above
    Correct
    Wrong
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Answer : 1. "homogeneous"
Explanation :

Answer: A) homogeneous Explanation: A Mixture is a material made up of two or more different substances which are mixed.   Mixtures can be either homogeneous or heterogeneous.   * A homogeneous mixture is a type of mixture in which the composition is uniform and every part of the solution has the same properties. * A heterogeneous mixture is a type of mixture in which the components can be seen, as there are two or more phases present.   Air is a homogeneous mixture of the gaseous substances nitrogen, oxygen, and smaller amounts of other substances.

Q: Who is in the judicial branch? 1470 0

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Answer :
Explanation :

Judicial branch is one among the three branches of the government.  Supreme court, the magistrate (local) and municipal (city) courts are there in the judicial branch. The Judicial branch interprets the laws.

Q: A can complete 9/10 part of a work in 31 days. After that, with the help of B he can complete the remaining work in 4 days. In how many days will  A and B together can complete that work ? 1470 0

  • 1
    36
    Correct
    Wrong
  • 2
    40
    Correct
    Wrong
  • 3
    42
    Correct
    Wrong
  • 4
    38
    Correct
    Wrong
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Answer : 2. "40"
Explanation :

Answer: B) 40 Explanation: Remaining work = 1 - 9/10 = 1/10   => A & B together completes 1/10 of work in 4 days   => 1 work can completed in ------ ? days   Let it be x days   =>  4110=x1   => x = 40 days.   Hence, A & B together can complete the work in 40 days.

Q: Solve the MathPuzzle Challenge ? 1469 0

  • 1
    4!
    Correct
    Wrong
  • 2
    5!
    Correct
    Wrong
  • 3
    6!
    Correct
    Wrong
  • 4
    Can't be determined
    Correct
    Wrong
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Answer : 4. "Can't be determined"
Explanation :

Answer: D) Can't be determined Explanation: NUMERICAL has 9 positions in which 2, 4, 6, 8 are even positions. And it contains 5 consonents i.e, N, M, R, C & L. Hence this cannot be done as 5 letters cannot be placed in 4 positions. Therefore, Can't be determined.

Q: The more there is the less you see. What is that? 1469 0

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Answer :
Explanation :

It is Darkness. If it is more darkness outside, we can see less in that.

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