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Percentages CAT Previous Year Questions (2017-2021) | Udit Saini | | Quantitative Aptitude |

MBA Pathshala・2 minutes read

A YouTube channel discusses CAT exam topics like percentages, emphasizing the practice of previous year questions to understand patterns and enhance preparation. Examples include solving questions on population increase and salary percentage calculations, stressing the importance of independent practice and detailing specific problem-solving methods.

Insights

  • Emphasis on practicing previous year CAT questions for self-confidence and preparation assessment, understanding question patterns, and levels in exams, and boosting motivation and preparation levels.
  • Detailed explanation and breakdown of CAT 2021 questions on metallic white and black balls, male and female population increase, Vishnu, Asha, and Ramesh's marks, and pass marks calculations, showcasing the importance of thorough problem-solving and understanding various question types and concepts.

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Recent questions

  • How can I prepare effectively for CAT exams?

    Practice previous year questions for self-assessment and confidence.

  • What topics are covered in the YouTube channel?

    Percentage, profit loss, discount, simple interest, compound interest.

  • Can you explain the CAT 2021 metallic balls question?

    Breakdown of ratios and calculations for metallic and non-metallic balls.

  • What is the male to female population ratio in 1970?

    1:3 male to female population ratio in 1970.

  • How can I boost motivation for exam preparation?

    Solve previous year exam papers independently before comparing methods.

Related videos

Summary

00:00

CAT Exam Prep: Percentage Questions Explained

  • YouTube channel discussing percentage topics and previous year CAT exam questions
  • Emphasis on practicing previous year questions for self-confidence and preparation assessment
  • Importance of understanding question patterns and levels in exams
  • Separating sessions for percentage, profit loss, discount, simple interest, and compound interest questions
  • Providing a playlist for Ratio Proportion questions in the video description
  • Detailed explanation of solving a CAT 2021 question on metallic white and black balls
  • Breakdown of the question into ratios and calculations for metallic and non-metallic balls
  • Clarification on the process of determining metallic and non-metallic balls in the question
  • Encouragement to practice previous year CAT questions for better understanding and preparation
  • Introduction of a second question on male and female population increase in a city, with a focus on percentage calculations

16:30

Population Growth and Gender Ratios Analysis

  • Population increased from 1970 to 1980 by 25%.
  • Male population increased by 40% during the same period.
  • Female population increased by 20% from 1970 to 1980.
  • In 1970, the male to female population ratio was 1:3.
  • Female population in 1980 was 360, with a 25% increase from 1970.
  • Male population in 1980 increased by 40% from 1970.
  • Total population in 1980 was 450, with a 25% increase from 1970.
  • If 90% of remaining matches are won, the total number of matches won will be 84.
  • Using the allegation method, the total number of matches won was calculated to be 120.
  • Solving previous year exam papers can boost motivation and preparation levels.

33:28

"Analyzing Data and Solving Math Problems"

  • Start by solving questions independently before comparing with provided methods
  • Consider a group of 100 people, with 28% being old members
  • Out of the total, young individuals are affected by a virus while the old are already sick
  • 28% of the members are okay, 25% are young, and 65% are literate
  • Among literates, 25% are young, leading to 16.25 young literates
  • Calculate the percentage of old people among literates and illiterates
  • Determine that 23.25 old illiterates are present out of 35
  • Calculate the percentage of old people among literates and illiterates, resulting in 66%
  • Understand the increase in price and weight, with a 20% rise in rice price
  • Solve a question involving Vishnu, Asha, and Ramesh's marks, leading to a final answer of 399
  • Analyze a scenario with 60% girls and 30 more boys, resulting in 72 girls and 30 boys
  • Calculate the percentage of girls who do not pass, equating to 20% of the total girls

56:21

Salary comparison and pass marks calculation in 2010.

  • Ramesh, Ganesh, and Rajesh's salaries are compared in 2010.
  • Ramesh's salary increased by 25%, equivalent to a 5/4 ratio.
  • To find the percentage increase in Rajesh's salary, the increment from 28 to 30 is calculated, resulting in a 7.14% increase.
  • The maximum possible score in an exam is determined, with pass marks being 68% less than the total marks.
  • Pass marks are calculated as 32% of the total marks.
  • The formula for pass marks is derived as 25 * 9 / 2, resulting in a value of 112.5.
  • Pass marks for N are calculated using the fraction 9/20, leading to a value of 112.5 for N.
  • The final calculation confirms N's value as 250.

01:22:14

Pass Marks Calculation and Attendance Analysis

  • 36 is 68% less than the pass marks, making 32% of the pass marks equal to 36.
  • The value of the pass marks is calculated as 25 * 9 / 32.
  • The actual pass mark is determined as 9/20 of N, with 9/25 equating to 99.
  • Arun's attendance is 40%, and Varun's is discussed in relation to future years.
  • Multiples of two and three are considered, with a percentage increase in Varun's attendance.
  • A library scenario is presented with 11500 books in fiction and non-fiction categories in 2015.
  • The increase in both categories is detailed, with a discrepancy due to not considering a 2% increase in non-fiction books.
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