Case Interview Math - Practice With Our Mental Math Tool for Your Consulting Interview

Use our interactive and user-friendly mental math tool to train your case interview math with respect to all basic operations (e.g. addition, multiplication, percentage). By comparing your performance to the overall PrepLounge community, you can improve your case math skills and make sure that you will be prepared for any calculations in your consulting interview.

Addition

Easy
Best Result:
200 points - Luciano
138 points - Karthik
109 points - Ronan
Medium
Best Result:
49 points - Luciano
46 points - Fatson
33 points - Howard
Hard
Best Result:
31 points - Jelle
30 points - Luciano
22 points - Ha-Long
Estimation
Best Result:
24 points - Siu
20 points - Luciano
19 points - Arthur

Subtraction

Easy
Best Result:
159 points - Karthik
156 points - Eyb0ss
100 points - Tom
Medium
Best Result:
47 points - Luciano
44 points - Anubhav
43 points - Eyb0ss
Hard
Best Result:
30 points - Jelle
27 points - Ha-Long
21 points - Hans
Estimation
Best Result:
89 points - Matteo
22 points - Siu
21 points - Angelo

Multiplication

Easy
Best Result:
2569 points - Eyb0ss
915 points - SC
353 points - Daniel
Medium
Best Result:
68 points - Howard
60 points - Eyb0ss
53 points - Tobias Bao Anh
Hard
Best Result:
18 points - Jelle
12 points - Harald
9 points - Ishan
Estimation
Best Result:
175 points - Ha-Long
44 points - Abjad
31 points - Angelo

Division

Easy
Best Result:
3069 points - Eyb0ss
1201 points - David
1126 points - Don
Medium
Best Result:
640 points - Anubhav
71 points - Eyb0ss
39 points - Paul
Hard
Best Result:
14 points - Luciano
6 points - Angelo
6 points - Elisabeth
Estimation
Best Result:
26 points - Siu
20 points - Julia
19 points - Oyinda

Percent

Easy
Best Result:
2300 points - Salamat
2171 points - Eyb0ss
370 points - Jenny
Medium
Best Result:
600 points - Don
222 points - Salamat
195 points - Eyb0ss
Hard
Best Result:
323 points - Salamat
260 points - Charlotte
180 points - Georg
Estimation
Best Result:
22 points - Jonas
21 points - Angelo
20 points - Daniel

Random

Easy
Best Result:
449 points - Michele
369 points - Luke
213 points - Rob
Medium
Best Result:
315 points - Luciano
82 points - Ha-Long
64 points - David
Hard
Best Result:
22 points - Anubhav
13 points - Michael
11 points - Marco
Estimation
Best Result:
27 points - Ha-Long
24 points - Dax
18 points - Rob

Practice Your Consulting Mental Math for Free

Fast and accurate mental math is a necessary requirement to pass your job interview at consulting companies like McKinsey, BCG or Bain. Therefore, you should invest regular time in training your case math skills. Find out more about why good math skills are so important for your case interview in our BootCamp article about mental math.

This Is How the Mental Math Tool Works

Choose one of the 24 tests above to check and improve your case math skills for free. You can take a test as many times as you want and see how you improved over time. Check out how you perform compared to other candidates. The top 3 ranking is recalculated monthly which means that you have the opportunity to climb the winners' podium every month. All other values (your average, all users average and your best results) are all-time values.

Further Math Prep

The "FASTMATH Ace the Case" online course provides a comprehensive set of tools to prepare for the quantitative portion of case interviews. It uses video-based instruction to teach efficient calculation methods in order to improve your speed and efficiency for the most common case calculations (multiplication, division, percentages and compound growth calculations).