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Learn the case interview basics, practice with 210+ cases, and benefit from extensive test materials, and interactive self-study tools.

Addition

Easy
Best Result:
150 points - Caroline
145 points - Daniel
141 points - Parsa
Medium
Best Result:
70 points - ravi
60 points - Felicia
32 points - Keanu
Hard
Best Result:
33 points - Jelle
29 points - Felicia
18 points - Alexandr
Estimation
Best Result:
36 points - Felicia
33 points - Jim
31 points - Mattis

Subtraction

Easy
Best Result:
167 points - Max
139 points - Max
138 points - Lisa
Medium
Best Result:
34 points - Keanu
29 points - Abdelrahman
25 points - T
Hard
Best Result:
64 points - Felicia
43 points - Jelle
22 points - Max
Estimation
Best Result:
29 points - Steffen
28 points - Felicia
27 points - Max

Multiplication

Easy
Best Result:
1876 points - Michael
1111 points - Felix
1044 points - Parsa
Medium
Best Result:
124 points - Atos
97 points - Parsa
60 points - MJ
Hard
Best Result:
69 points - Phuc
24 points - Jelle
22 points - Felicia
Estimation
Best Result:
31 points - Muhammed D
27 points - Atos
23 points - Felicia

Division

Easy
Best Result:
1753 points - Simon
1100 points - Malte
408 points - Ethan
Medium
Best Result:
49 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:
412 points - Leon
406 points - Pierfrancesco Mangino
354 points - Scott
Medium
Best Result:
432 points - Henri
233 points - Atos
198 points - MJ
Hard
Best Result:
216 points - Max
211 points - Atos
85 points - Christoph
Estimation
Best Result:
21 points - Felicia
17 points - Paul
14 points - Abdelrahman

Random

Easy
Best Result:
467 points - pablo
332 points - Petra
315 points - Henri
Medium
Best Result:
155 points - David
123 points - Ian
74 points - F
Hard
Best Result:
29 points - Felicia
17 points - Antoine
12 points - Ayman
Estimation
Best Result:
18 points - Max
17 points - Brett
17 points - Antoine
Random - Method and Difficulty
Best Result:
13 points - Ole
12 points - Max
11 points - Dumo

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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