McKinsey Redrock, a new game within McKinsey's Problem Solving Game, is utilized in recruitment and corporate evaluations. It simulates real-world scenarios where quick thinking and precise calculations are essential.
This advanced tool tests candidates on their ability to work under stress, handle complex problems, and make data-driven decisions. They must complete the test within 35 minutes, showcasing their skills under pressure. Excelling in mathematics is crucial, as at least half of the test covers various aspects of it, including probability and statistics.
This blog explores the different types of math operations required, the importance of manual calculations, and the use and interpretation of graphs, providing a comprehensive guide on effectively tackling this challenge.
Types of calculations needed for Redrock
When facing Redrock, aspirants must address a series of mathematical tasks ranging from basic arithmetic to multiple statistical computations. Here are the main types of calculations that may be required:
Basic arithmetic operations:
- Addition;
- Subtraction;
- Multiplication (to determine percentage increases or scale quantities);
- Division (necessary for calculating averages or evenly distributing quantities).
Percentage computations
Firstly, it's important to distinguish between percentages and percentage points:
- Percentage increase or decrease indicates the relative change of an amount compared to its initial level;
- Percentage points measure instead the absolute difference between two percentages. For example, going from 20% to 30% represents an increase of 10 percentage points.
Want to know more? You can check our article focused on percentage calculation, with formulas and examples.
Basic algebra:
- Equations;
- Proportions.
Statistics:
- Weighted average: some values have more significance than others, influencing the result to a greater extent.
- Probability: it is a measure of the likelihood that an event will occur. Calculating the probability of single and combined events includes:
- Intersection of events: the chance that multiple events happen simultaneously;
- Union of events: the probability that at least one of several events will occur;
- Complements: the chance that an event will not happen.
Being prepared for every type of calculation in the Redrock Study Solve Game is essential for success.
Mastering these skills allows candidates to tackle the challenges confidently and accurately, ensuring precise and timely responses.
Calculations with pen and paper might be helpful
Redrock Study provides a handheld calculator on the screen, but in some cases pen and paper can be helpful. According to feedback we received, the digital tool provided may not be as fast as expected, especially when dealing with large numbers or long decimals.
Here below how it looks like:
In some cases, performing basic operations or figuring out percentage increases is much faster and easier to document the steps on paper.
This ensures you keep your workflow smooth, avoiding mistakes. Furthermore, pen and paper can be invaluable for intermediate steps or quickly verifying results obtained through other digital tools.
During the revision phase, applicants can check answers. For this reason, manual calculations are an effective method to verify each step. However, it's crucial to primarily use the calculator provided by McKinsey, since the test tracks not only your answers but also your decision-making processes. These clicks and moves are taken into consideration by company’s selection process.
Understanding and using graphs in Redrock Study
A significant aspect of the Redrock Study involves using graphs, highlighting the necessity of a comprehensive understanding of various types of graphical representations, including:
- Histograms;
- Stacked bar charts;
- Bar charts;
- Pie charts;
- Bubble charts;
- Line charts.
The candidate will be asked to select an appropriate chart for the required data analysis as shown in this example:
For example, a bar graph can be the optimal choice for comparing distinct variables. Despite Part 2 of the test adhering to the "not one step back" rule, in Part 1, the applicant can move freely between the three sections: Written Report, Graph Selection, and Visual Report. Therefore, it is possible to change the selected chart if the initial choice later reveals itself not suitable.
Calculation speed is essential
Remember that candidates must complete the Redrock Study within a 35-minute timeframe (here we discussed Redrock's time management). In the dynamic landscape of the Solve Game, mastering calculation speed, time management, and continuous practice is not just a strategy but the key to unlocking your full potential to stand out from the competition.
Practicing how to apply this knowledge before taking the test is fundamental. We recommend you download Redrock’s free template and game simulator to hone your skills and gather valuable insights, enabling you to stand out.
Begin your journey to success now, learn by practicing.
