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Learn the case interview basics, practice with 220+ cases, and benefit from extensive test materials, and interactive self-study tools.

Addition

Easy
Best Result:
1010 points - RaylogVT
233 points - Abc
227 points - Caroline
Medium
Best Result:
81 points - ravi
60 points - Felicia
33 points - Keanu
Hard
Best Result:
40 points - Jelle
29 points - Felicia
21 points - Alexandr
Estimation
Best Result:
36 points - Felicia
34 points - f
33 points - Jim

Subtraction

Easy
Best Result:
1024 points - RaylogVT
241 points - Jasper
199 points - Max
Medium
Best Result:
50 points - Abc
34 points - Keanu
33 points - Ankit Lal
Hard
Best Result:
64 points - Felicia
44 points - Jelle
23 points - Tom
Estimation
Best Result:
29 points - Steffen
28 points - Felicia
27 points - Max

Multiplication

Easy
Best Result:
1876 points - Michael
1535 points - Ankit Lal
1111 points - Felix
Medium
Best Result:
135 points - Atos
113 points - YJ
97 points - Parsa
Hard
Best Result:
69 points - Phuc
24 points - Jelle
22 points - Felicia
Estimation
Best Result:
32 points - Atos
31 points - Muhammed D
23 points - Felicia

Division

Easy
Best Result:
1753 points - Simon
1100 points - Malte
519 points - Jasmine
Medium
Best Result:
60 points - Ethan
46 points - Daniel
34 points - Kevin
Hard
Best Result:
18 points - Felicia
14 points - Phuc
13 points - Constantin
Estimation
Best Result:
47 points - Lothar
39 points - Felicia
35 points - Jim

Percent

Easy
Best Result:
500 points - Dawood
452 points - inès
412 points - Leon
Medium
Best Result:
475 points - Atos
432 points - Henri
198 points - MJ
Hard
Best Result:
681 points - Atos
216 points - Max
135 points - Saksa
Estimation
Best Result:
21 points - Felicia
17 points - Paul
14 points - Johannes

Random

Easy
Best Result:
1103 points - pablo
332 points - Petra
315 points - Henri
Medium
Best Result:
155 points - David
123 points - Ian
117 points - Samrudhi
Hard
Best Result:
52 points - Phuc
29 points - Felicia
17 points - Antoine
Estimation
Best Result:
55 points - Howard
18 points - Max
17 points - Brett
Random - Method and Difficulty
Best Result:
13 points - Ole
12 points - Max
11 points - Abdelrahman

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 Case Interview Basics 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.

Mental Math Practice – Train Your Math Skills for Your Case Interview in Consulting

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.

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