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:
500 points - Keanu
168 points - Kamal
135 points - Tyra
Medium
Best result:
39 points - Max
35 points - Keanu
34 points - Kamal
Hard
Best result:
15 points - Keanu
15 points - Kamal
11 points - Nicholas
Estimation
Best result:
15 points - Chris
13 points - Abdurrahman
12 points - Tim

Subtraction

Easy
Best result:
1000 points - Keanu
180 points - Kamal
110 points - Adi
Medium
Best result:
46 points - Kamal
39 points - Keanu
36 points - Max
Hard
Best result:
77 points - Tom
30 points - Kamal
21 points - Keanu
Estimation
Best result:
3 points - Laila
1 point - Emmanuel

Multiplication

Easy
Best result:
1000 points - Keanu
665 points - Siviwe
223 points - Paramita
Medium
Best result:
110 points - Max
40 points - Chip
34 points - Julius
Hard
Best result:
31 points - Phuc
13 points - Jelle
11 points - Francesco
Estimation
Best result:
10 points - Nerine
2 points - Laila

Division

Easy
Best result:
2000 points - Keanu
1125 points - Julius
1048 points - Adi
Medium
Best result:
105 points - Max
52 points - Keanu
51 points - Zhuo
Hard
Best result:
6 points - Laila
4 points - Chris
3 points - Youness
Estimation
Best result:
4 points - Jakob
4 points - Laila
3 points - Nicola

Percent

Easy
Best result:
750 points - Keanu
300 points - Kamal
276 points - Julius
Medium
Best result:
106 points - Kamal
83 points - Nelly
79 points - Julius
Hard
Best result:
500 points - Keanu
110 points - Kamal
51 points - Jeffrey
Estimation
Best result:
5 points - Maximilian
4 points - Zhuo
2 points - Fire

Random

Easy
Best result:
243 points - Adi
200 points - Kamal
176 points - Clemens F
Medium
Best result:
325 points - David
204 points - Samrudhi
197 points - Ian
Hard
Best result:
9 points - Michael
8 points - Shijia
8 points - Antonia
Estimation
Best result:
29 points - Samrudhi
22 points - Adi
18 points - Abdurrahman
Random - Method and Difficulty
Best Result:
8 points - Gereon
7 points - michela
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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.