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:
513 points - Jiangduo
459 points - Petra
267 points - Miriam
Medium
Best Result:
47 points - Jiangduo
41 points - Howard
39 points - Miriam
Hard
Best Result:
22 points - Qian
21 points - Jiangduo
20 points - Anubhav
Estimation
Best Result:
32 points - Jiangduo
30 points - Dan
25 points - Kevin

Subtraction

Easy
Best Result:
280 points - Jiangduo
224 points - Miriam
150 points - Jenny
Medium
Best Result:
59 points - Jiangduo
54 points - Howard
52 points - Anubhav
Hard
Best Result:
46 points - Jiangduo
35 points - Anubhav
27 points - Qian
Estimation
Best Result:
44 points - Jiangduo
28 points - Dan
26 points - Boris

Multiplication

Easy
Best Result:
1771 points - Jiangduo
1509 points - Katie
1400 points - Miriam
Medium
Best Result:
358 points - Anubhav
99 points - Howard
80 points - Miriam
Hard
Best Result:
15 points - Harald
11 points - Joseph
9 points - Qian
Estimation
Best Result:
29 points - Kevin
28 points - Jessy
27 points - Heike

Division

Easy
Best Result:
3113 points - Dan
1143 points - Natasha
1077 points - Vlad
Medium
Best Result:
61 points - Jiangduo
57 points - Francesco
52 points - Jenny
Hard
Best Result:
16 points - Anubhav
7 points - Isaac
6 points - Qian
Estimation
Best Result:
37 points - Kevin
19 points - Heike
18 points - Annie

Percent

Easy
Best Result:
2500 points - Miriam
1000 points - Jenny
245 points - Kevin
Medium
Best Result:
1000 points - Miriam
405 points - Francesco
217 points - Jenny
Hard
Best Result:
285 points - Miriam
148 points - Jenny
123 points - Francesco
Estimation
Best Result:
21 points - Patrick
17 points - Jerry
16 points - Kevin

Random

Easy
Best Result:
1342 points - Miriam
1201 points - Ha-Long
779 points - Malvin
Medium
Best Result:
137 points - Anubhav
75 points - Malvin
67 points - Miriam
Hard
Best Result:
27 points - Anubhav
15 points - Neel
14 points - Anna
Estimation
Best Result:
500 points - Matteo
41 points - Ha-Long
23 points - Will

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).