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
164 points - Tyra
Medium
Best result:
60 points - crys
39 points - Max
35 points - Keanu
Hard
Best result:
25 points - Jelle
22 points - Francesco
15 points - Kamal
Estimation
Best result:
21 points - Furkan
15 points - Chris
13 points - Abdurrahman

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 - Kevin
Estimation
Best result:
14 points - Lizzy
9 points - Marlon
7 points - alxkl

Multiplication

Easy
Best result:
1000 points - Keanu
665 points - Siviwe
223 points - Paramita
Medium
Best result:
110 points - Max
94 points - crys
40 points - Kamal
Hard
Best result:
31 points - Phuc
17 points - Francesco
13 points - Jelle
Estimation
Best result:
12 points - Nerine
11 points - Michael
4 points - Mohammad

Division

Easy
Best result:
2000 points - Keanu
1125 points - Julius
1048 points - Adi
Medium
Best result:
105 points - Max
56 points - Clément
52 points - Keanu
Hard
Best result:
11 points - Francesco
6 points - Laila
4 points - Chris
Estimation
Best result:
17 points - Michael
9 points - Lizzy
9 points - Francesco

Percent

Easy
Best result:
750 points - Keanu
300 points - Kamal
276 points - Julius
Medium
Best result:
182 points - Johanna
157 points - Julius
106 points - Kamal
Hard
Best result:
500 points - Keanu
142 points - Johanna
110 points - Kamal
Estimation
Best result:
18 points - Martin
18 points - Francesco
10 points - James

Random

Easy
Best result:
243 points - Adi
200 points - Kamal
192 points - Furkan
Medium
Best result:
325 points - David
208 points - Ian
204 points - Samrudhi
Hard
Best result:
18 points - Francesco
12 points - Michael
9 points - Thomas
Estimation
Best result:
29 points - Samrudhi
22 points - Adi
18 points - Abdurrahman
Random - Method and Difficulty
Best Result:
8 points - Gereon
7 points - michela
7 points - Adi
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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.