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Learn the case interview basics, practice with 200+ cases, and benefit from extensive test materials, and interactive self-study tools.

Addition

Easy
Best Result:
94 points - S Anuja
76 points - Paul
67 points - Karl
Medium
Best Result:
80 points - ravi
26 points - Ethan
19 points - Lena
Hard
Best Result:
24 points - Jelle
15 points - Alexandr
14 points - Ethan
Estimation
Best Result:
21 points - Christian
17 points - Igor
16 points - andrey

Subtraction

Easy
Best Result:
165 points - Tomás
78 points - Martin
78 points - Matteo
Medium
Best Result:
27 points - Ethan
26 points - Matteo
19 points - Henri
Hard
Best Result:
26 points - Ethan
17 points - Matt
14 points - Jens
Estimation
Best Result:
10 points - Christian
10 points - Jens

Multiplication

Easy
Best Result:
446 points - shubham
237 points - Tomás
223 points - Lolo
Medium
Best Result:
101 points - Atos
49 points - Ethan
48 points - Josh
Hard
Best Result:
48 points - Phuc
13 points - Harald
6 points - Ethan
Estimation
Best Result:
21 points - Jens
15 points - Christian
2 points - Li

Division

Easy
Best Result:
1000 points - Matteo
411 points - Enrico
152 points - Martin
Medium
Best Result:
55 points - Ethan
45 points - Josh
33 points - Matteo
Hard
Best Result:
0 points
Estimation
Best Result:
23 points - Jens
19 points - Christian

Percent

Easy
Best Result:
148 points - Matteo
74 points - Ron Bergman
57 points - Ronja
Medium
Best Result:
51 points - Matteo
29 points - Moritz
29 points - Jakob
Hard
Best Result:
27 points - pinda
12 points - mohamad
9 points - Joseph
Estimation
Best Result:
54 points - RaylogVT
6 points - Joseph
1 point - Christian

Random

Easy
Best Result:
459 points - David
334 points - Petra
212 points - Yassine
Medium
Best Result:
262 points - David
117 points - Samrudhi
115 points - Oskar
Hard
Best Result:
14 points - Presiyana
11 points - Brett
5 points - Antonia
Estimation
Best Result:
13 points - Brett
5 points - Maximilian
3 points - Brad
Random - Method and Difficulty
Best Result:
9 points - Jens
7 points - Joseph
4 points - Maximilian

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.