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
133 points - Karthik
92 points - Eyb0ss
Medium
Best Result:
49 points - Luciano
46 points - Fatson
33 points - Howard
Hard
Best Result:
30 points - Luciano
28 points - Jelle
22 points - Ha-Long
Estimation
Best Result:
20 points - Luciano
20 points - Siu
19 points - Diogo

Subtraction

Easy
Best Result:
156 points - Eyb0ss
151 points - Karthik
100 points - Tom
Medium
Best Result:
43 points - Eyb0ss
38 points - Howard
38 points - Sol
Hard
Best Result:
27 points - Ha-Long
19 points - Nicolas
19 points - Angelo
Estimation
Best Result:
21 points - Angelo
18 points - Ina
14 points - Stefan

Multiplication

Easy
Best Result:
2569 points - Eyb0ss
915 points - SC
347 points - Lobna
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:
59 points - Eyb0ss
36 points - Charlotte
33 points - Don
Hard
Best Result:
6 points - Elisabeth
6 points - Angelo
5 points - Marco
Estimation
Best Result:
20 points - Julia
19 points - Oyinda
18 points - Cynthia

Percent

Easy
Best Result:
2300 points - Salamat
2171 points - Eyb0ss
286 points - Jannik
Medium
Best Result:
600 points - Don
195 points - Eyb0ss
140 points - Salamat
Hard
Best Result:
260 points - Charlotte
180 points - Georg
126 points - Salamat
Estimation
Best Result:
22 points - Jonas
20 points - Daniel
19 points - Ina

Random

Easy
Best Result:
449 points - Michele
316 points - Luke
209 points - Eyb0ss
Medium
Best Result:
296 points - Luciano
82 points - Ha-Long
64 points - David
Hard
Best Result:
22 points - Anubhav
13 points - Michael
11 points - Marco
Estimation
Best Result:
24 points - Dax
24 points - Ha-Long
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).