Use Our Resources and Tools to Get Started With Your Preparation!

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

Addition

Easy
Best result:
358 points - Jennifer
150 points - Nicholas
142 points - Jun
Medium
Best result:
69 points - ravi
39 points - Jennifer
26 points - Justin
Hard
Best result:
44 points - Tom
35 points - Jelle
20 points - Jennifer
Estimation
Best result:
43 points - Jennifer
22 points - Maximilian
20 points - Maximilian

Subtraction

Easy
Best result:
291 points - Corsin
230 points - Max
178 points - Petra
Medium
Best result:
34 points - Corsin
30 points - Matteo
26 points - Jennifer
Hard
Best result:
67 points - Tom
38 points - Jelle
27 points - Angela
Estimation
Best result:
26 points - Max
21 points - Maximilian
15 points - Julian

Multiplication

Easy
Best result:
1107 points - Christina
709 points - Jennifer
438 points - Mandy
Medium
Best result:
500 points - Atos
55 points - Ethan
43 points - Corsin
Hard
Best result:
67 points - Phuc
19 points - Harald
13 points - Jelle
Estimation
Best result:
74 points - Nargiz
25 points - Maximilian
16 points - S

Division

Easy
Best result:
637 points - Peter
565 points - Maria
283 points - Johannes
Medium
Best result:
74 points - Ethan
49 points - Corsin
46 points - Jun
Hard
Best result:
4 points - Konstantin
3 points - Nils
3 points - Lizzy
Estimation
Best result:
22 points - pncd
15 points - S
10 points - Laurens

Percent

Easy
Best result:
532 points - Angela
258 points - Franziska
191 points - Matteo
Medium
Best result:
154 points - Angela
147 points - Corsin
75 points - Katharina
Hard
Best result:
139 points - Jose
133 points - Angela
77 points - Sohaib
Estimation
Best result:
18 points - Maximilian
16 points - Philipp
14 points - pncd

Random

Easy
Best result:
402 points - Yassine
359 points - Quentin
289 points - Q
Medium
Best result:
305 points - David
192 points - Samrudhi
101 points - Ian
Hard
Best result:
15 points - Samrudhi
14 points - Jose
11 points - Presiyana
Estimation
Best result:
78 points - Howard
73 points - Samrudhi
26 points - Quentin
Random - Method and Difficulty
Best Result:
11 points - Robin
10 points - Tim
10 points - A Sesarin
Do your mental math skills need a little update?
Sign up now for free and practice with our mental math tool.

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 fast 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.

How likely are you to recommend us to a friend or fellow student?
0 = Not likely
10 = Very likely
You are a true consultant! Thank you for consulting us on how to make PrepLounge even better!
^