Get Your Mental Math Skills up to Speed

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

Addition

Easy
Best result:
596 points - Petra
175 points - Keanu
139 points - Daniel
Medium
Best result:
53 points - Clarissa
44 points - Max
35 points - Marcel Munsch
Hard
Best result:
33 points - Jelle
14 points - Anna
13 points - Marcel Munsch
Estimation
Best result:
33 points - Keanu
29 points - Pauli
28 points - Clément

Subtraction

Easy
Best result:
222 points - Keanu
213 points - Clément
119 points - Tyra
Medium
Best result:
50 points - Clément
40 points - Max
29 points - Anna
Hard
Best result:
38 points - Jelle
30 points - Clément
23 points - Anna
Estimation
Best result:
21 points - Keanu
20 points - Clément
15 points - Stefan

Multiplication

Easy
Best result:
610 points - Keanu
537 points - Siviwe
209 points - Clément
Medium
Best result:
100 points - Max
55 points - Adi
46 points - Adri
Hard
Best result:
39 points - Phuc
17 points - Jelle
8 points - Keanu
Estimation
Best result:
16 points - Keanu

Division

Easy
Best result:
1000 points - willem
1000 points - Keanu
676 points - Mariafe
Medium
Best result:
101 points - Max
53 points - Adi
53 points - Adri
Hard
Best result:
7 points - Keanu
5 points - Clément
4 points - Paul
Estimation
Best result:
26 points - Keanu

Percent

Easy
Best result:
1048 points - Arthur
667 points - Clément
424 points - Keanu
Medium
Best result:
662 points - Arthur
238 points - Clément
137 points - Johanna
Hard
Best result:
355 points - Arthur
110 points - Clément
104 points - Adi
Estimation
Best result:
23 points - Arthur
13 points - Dennis
12 points - Keanu

Random

Easy
Best result:
453 points - Keanu
266 points - Clemens Finke
190 points - Thomas
Medium
Best result:
143 points - Ian
102 points - Max
82 points - DE
Hard
Best result:
12 points - Presiyana
11 points - Keanu
10 points - Rintsing
Estimation
Best result:
13 points - Keanu
11 points - Tim
9 points - Umut Onuralp Polat
Random - Method and Difficulty
Best Result:
12 points - Keanu
9 points - Daniel
9 points - Kai
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Practice Your Mental Math Skills for Free

Fast and accurate mental math is a necessary skill for many job interviews and also for your job. Therefore, it’s important to dedicate regular time to training your math skills. Discover more about why strong math abilities are essential in our article on the fundamentals of fast math.

How the Mental Math Tool Works

Choose one of the 24 tests above to assess and improve your math skills for free. You can take a test as many times as you like and track your improvement over time. See how you perform compared to other candidates. The top 3 rankings are recalculated monthly, giving you the chance to climb the leaderboard each month. All other metrics, including your average, the overall user average, and your best results, are cumulative.

Mental Math Practice – Train Your Math Skills for Your Interview

Use our interactive and user-friendly mental math tool to train your interview math skills in all basic operations (e.g., addition, multiplication, percentages). By comparing your performance to the overall PrepLounge community, you can enhance your math skills and ensure you are well-prepared for any calculations during your interview.