IIT JEE Practice Question and Answer
8Q: How many zeros are there from 1 to 10000 ? 2660 05b5cc741e4d2b4197774f9e0
5b5cc741e4d2b4197774f9e0- 12893true
- 24528false
- 36587false
- 44875false
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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 05b5cc6fbe4d2b4197774f0f1
5b5cc6fbe4d2b4197774f0f1- 1Rs. 7500true
- 2Rs. 4520false
- 3Rs. 8750false
- 4Rs. 6350false
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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 05b5cc607e4d2b4197774b544
5b5cc607e4d2b4197774b544- 1doubtful accountsfalse
- 2bad debtsfalse
- 3accounts receivablefalse
- 4notes receivabletrue
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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 05b5cc645e4d2b4197774bbea
5b5cc645e4d2b4197774bbea- 1symbolic interactionismtrue
- 2the feminist perspectivefalse
- 3structural functionalismfalse
- 4the conflict perspectivefalse
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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 05b5cc6a7e4d2b4197774ce03
5b5cc6a7e4d2b4197774ce03- 1Compilertrue
- 2Adobefalse
- 3Microsoft Officefalse
- 4Driversfalse
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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 05b5cc72ce4d2b4197774f7a6
5b5cc72ce4d2b4197774f7a6- 1125false
- 2155false
- 3135false
- 4165true
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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 05b5cc636e4d2b4197774b9ff
5b5cc636e4d2b4197774b9ff- 12false
- 21.5true
- 31.25false
- 42.5false
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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 05b5cc68be4d2b4197774c3ab
5b5cc68be4d2b4197774c3ab- 1focused on helping poor African American workerstrue
- 2helped middle-class African Americans struggle for political and social justicefalse
- 3formed in response to race riots in 1908false
- 4led by Jane Addams and Ida B. Wellsfalse
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Answer : 1. "focused on helping poor African American workers"
Explanation :
Answer: A) focused on helping poor African American workers Explanation:

