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A Message From the Creator


Hello! My name is Matthew Tambiah I’m the Creator of FastMath, a unique mental calculation system. I’m a former McKinsey consultant and I graduated with highest honors from Harvard with  a Bachelor’s degree in Electrical and Computer Engineering, and have an MBA from MIT Sloan.

Math has always come naturally to me, and I was always helping friends out with math and science courses in high school, in college at Harvard, and in business school at MIT. Over the years, I have seen first-handthat many people struggle with math. I always through “if I were teaching this topic, I would teach it different!” 

Well, now I’m doing that. I created FastMath to teach the way I think about math — and calculations in general — which was always very different from the way math was taught in school. I always looked for the simplest way to solve a particular problems, rather than taking a one-size-fits-all approach to calculations. 

In FastMath I will teach you how to do this too! I will show you how to solve problems with the least amount of effort, and in the fastest and most efficient manner. But to do this, you really need to understand math, which I'll also teach you in FastMath courses.

FastMath will show you that math doesn't have to be scary and in-comprehensible, but is actually a very useful tool.

So join now to learn how FastMath can help you succeed in your job interviews.

FASTMATH Ace the Case Includes

  • Efficient Calculation Methods Designed Specifically for Case Interviews

  • Efficient Solution Methods for the Most Important Quant Problem Types

  • On Demand Video Lessons

  • The Best Quant Case Preparation Resource Available!

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Course curriculum

  • 4

    FastMath Multiplication and Division Methods

    • FastMath Overview FREE PREVIEW
    • Multiplication Methods
    • Division — Part 1
    • Division — Part 2
    • Multiplication & Division Downloadable Files
    • Percentage Multiplication Lesson
    • Percentage Multiplication Practice Problems
  • 5

    FastMath Reference Tables

    • FastMath Reference Tables
  • 6

    Breakeven and Profitability Analysis

    • Breakeven_Example I
    • Simple Profitability Analysis
  • 7

    Market Sizing & Estimation Problems

    • Market Sizing Estimation Overview
    • Example I
    • Example II
    • Market Sizing Frameworks & Universal Framework
    • Recommendations & Best Practices
    • Practice Problems
    • Market Sizing Solutions
  • 8

    Percentage Growth / Change

    • Compound Growth Part I
    • Compound Growth Part II: NPV
    • Compound Growth Part III
    • Calculating Doubling Time
  • 9

    Quant Case Problems

    • Overview
    • Response Rate Analysis
    • Economies of Scale
    • Chart Reading I
    • Price Elasticity
    • Chart Reading II
    • McKinsey Organ Donation
    • Investment Decision Analysis
    • Customer Segmentation Analysis
  • 10

    Assessment Resources

    • Quant Assessment Quiz
    • Solutions: Quant Assessment Quiz
  • 11

    Practice Problems & Exercises

    • Large Number Multiplication Practice Problems
    • Percentage Multiplication Practice Problems
    • Market Sizing & Estimation Practice Problems
    • Practice Problems: Simple Profitability Analysis
    • FastMath_Mental_Math_Exercises