IIT JEE Practice Question and Answer

Q: How many zeros are there from 1 to 10000 ? 2660 0

  • 1
    2893
    Correct
    Wrong
  • 2
    4528
    Correct
    Wrong
  • 3
    6587
    Correct
    Wrong
  • 4
    4875
    Correct
    Wrong
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Answer : 1. "2893"
Explanation :

Answer: A) 2893 Explanation: For solving this problem first we would break the whole range in 5 sections 1) From 1 to 9Total number of zero in this range = 0 2) From 10 to 99Total possibilities = 9*1 = 9 ( here 9 is used for the possibilities of a non zero integer) 3) From 100 to 999 - three type of numbers are there in this range a) x00 b) x0x c) xx0 (here x represents a non zero number)Total possibilities for x00 = 9*1*1 = 9, hence total zeros = 9*2 = 18for x0x = 9*1*9 = 81, hence total zeros = 81similarly for xx0 = 81 total zeros in three digit numbers = 18 + 81 +81 = 180 4) From 1000 to 9999 - seven type of numbers are there in this rangea)x000 b)xx00 c)x0x0 d)x00x e)xxx0 f)xx0x g)x0xxTotal possibilities for x000 = 9*1*1*1 = 9, hence total zeros = 9*3 = 27 for xx00 = 9*9*1*1 = 81, hence total zeros = 81*2 = 162 for x0x0 = 9*1*9*1 = 81, hence total zeros = 81*2 = 162for x00x = 9*1*1*9 = 81, hence total zeros = 81*2 = 162 for xxx0 = 9*9*9*1 = 729, hence total zeros = 729*1 = 729for xx0x = 9*9*1*9 = 729, hence total zeros = 729*1 = 729for x0xx = 9*1*9*9 = 729, hence total zeros = 729*1 = 729total zeros in four digit numbers = 27 + 3*162 + 3*729 = 2700thus total zeros will be 0+9+180+2700+4 (last 4 is for 4 zeros of 10000)= 2893

Q: Arun and Varun started business in partnership investing Rs. 20,000 and Rs. 15,000 respectively. After six months, Akhil joined them with Rs. 20,000. What will be Varun's share in the total profit of Rs. 25,000 earned at the end of 2 years from the starting of the business ? 2659 0

  • 1
    Rs. 7500
    Correct
    Wrong
  • 2
    Rs. 4520
    Correct
    Wrong
  • 3
    Rs. 8750
    Correct
    Wrong
  • 4
    Rs. 6350
    Correct
    Wrong
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Answer : 1. "Rs. 7500"
Explanation :

Answer: A) Rs. 7500 Explanation: Arun : Varun : Akhil = (20000 x 24) : (15000 x 24) : (20000 x 18) = 4:3:3 B's share = 25000 x 3/10 = Rs. 7500.

Q: Interest is usually associated with 2658 0

  • 1
    doubtful accounts
    Correct
    Wrong
  • 2
    bad debts
    Correct
    Wrong
  • 3
    accounts receivable
    Correct
    Wrong
  • 4
    notes receivable
    Correct
    Wrong
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Answer : 4. "notes receivable"
Explanation :

Answer: D) notes receivable Explanation: Interest is usually associated with notes receivable.

Q: Which sociological perspective is most closely linked to microsociology? 2652 0

  • 1
    symbolic interactionism
    Correct
    Wrong
  • 2
    the feminist perspective
    Correct
    Wrong
  • 3
    structural functionalism
    Correct
    Wrong
  • 4
    the conflict perspective
    Correct
    Wrong
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Answer : 1. "symbolic interactionism"
Explanation :

Answer: A) symbolic interactionism Explanation: There are two types of sociological theories: 1. Macro and 2. Micro. Macro theories focus on the society as a whole and aim at establishing the general characteristics of the society. It is basically looking at the society as a whole and looking at a bigger picture. It aims to answer three basic questions: 1) What holds the societies together? 2) What are the sources of conflict in a society? 3) How do societies change? There are two branches of macro-sociological theories: consensus and conflict, with the main representative being functionalist and marxist respectively.   Micro theories on the other hand, focus on the individuals who make up the society unlike macro theory which looks at the society as a whole. Micro theories are small scale. Consider it a magnifying glass, when you look through it, you 'zoom' in to the society and see the individuals who have made up that particular society.   Symbolic interactionism is the sociological perspective which is most closely linked to microsociology.

Q: Which of the following is NOT a Software? 2650 0

  • 1
    Compiler
    Correct
    Wrong
  • 2
    Adobe
    Correct
    Wrong
  • 3
    Microsoft Office
    Correct
    Wrong
  • 4
    Drivers
    Correct
    Wrong
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Answer : 1. "Compiler"
Explanation :

Answer: A) Compiler Explanation: A compiler is not a software. Adobe, Microsoft office and Drivers are all software on a computer.

Q: Total number of students in 3 classes of a school is 333 . The number of students in class 1 and 2 are in 3:5 ratio and 2 and 3 class are 7:11 ratio . What is the strength of class that has highest number of students ? 2649 0

  • 1
    125
    Correct
    Wrong
  • 2
    155
    Correct
    Wrong
  • 3
    135
    Correct
    Wrong
  • 4
    165
    Correct
    Wrong
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Answer : 4. "165"
Explanation :

Answer: D) 165 Explanation: Ratio C1:C2 = 3:5 and C2:C3 = 7:11So C1:C2:C3 = 21 : 35 : 55Let the strength of three classes are 21x, 35x and 55x respectively, then Given that 21x + 35x + 55x = 333=> 111x = 333 or x=3So strength of the class with highest number of students =55x = 55x3 = 165.

Q: Five boxes of bananas sell for Rs. 30. how many boxes can you buy for Rs.9? 2648 0

  • 1
    2
    Correct
    Wrong
  • 2
    1.5
    Correct
    Wrong
  • 3
    1.25
    Correct
    Wrong
  • 4
    2.5
    Correct
    Wrong
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Answer : 2. "1.5"
Explanation :

Answer: B) 1.5 Explanation: Given Five boxes of bananas sell for Rs. 30. => 1 Box of Bananas for = 30/5 = Rs. 6   Then, for Rs. 9 => 9/6 = 3/2 = 1.5   Hence, for Rs. 9, 1.5 box of bananas can buy.

Q: Which of the following describes the Urban League? 2648 0

  • 1
    focused on helping poor African American workers
    Correct
    Wrong
  • 2
    helped middle-class African Americans struggle for political and social justice
    Correct
    Wrong
  • 3
    formed in response to race riots in 1908
    Correct
    Wrong
  • 4
    led by Jane Addams and Ida B. Wells
    Correct
    Wrong
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Answer : 1. "focused on helping poor African American workers"
Explanation :

Answer: A) focused on helping poor African American workers Explanation:

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