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Tips to do big multiplications in my mind

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on May 24, 2017

Global

Which is the most efficient way to multiply large numbers without losing track of zeros?

Is there a foolproof methodology you would suggest?

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Top Answer by

Vlad

Coach

McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School

Case Math Without Tears: How to Build Real Math Confidence

Build real confidence in case math with tips to stay sharp, avoid mistakes, and keep calm under pressure.

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How to Practice Math Skills

When preparing for a case interview in consulting, you will quickly realize that math is an essential component. Don’t worry, you don’t need to be a math genius – it’s enough to handle numbers in a structured and confident manner. Important Calculations and Computations in Case InterviewsLet's take a look at the types of calculations required and how you can best prepare for them. Typically, math in case interviews is usually tested in the following ways: 1. Basic Arithmetic OperationsThe foundation of any mathematical task is basic arithmetic: addition, subtraction, multiplication, and division. Quick and error-free calculation, either mentally or on paper, is crucial.2. Percentages and FractionsPercentage calculations and working with fractions are often part of case interviews. You should be confident in calculating percentages and converting fractions to decimals and vice versa. This is especially relevant for tasks such as capacity change or profitability analysis.3. Estimation QuestionsEstimation questions test your sense of magnitude and your ability to quickly provide plausible numbers. Practice making rough estimates for various scenarios, such as the size of a market or the number of customers in a store.4. Charts, Data, and TablesIn many interviews, you will be presented with data in the form of charts and tables. Your task is to quickly analyze this data and draw the correct conclusions. Practice recognizing data patterns and filtering out relevant information. Here, you can practice with Numerical Reasoning Drills!5. Word ProblemsWord problems test your ability to understand and solve mathematical problems from a written scenario. It’s important to handle these types of tasks confidently and quickly. In our Brainteaser Library, you will find many word problems that require mathematical skills. Solve them now!

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