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:
149 points - Tyra
136 points - Jordan
131 points - Petra
Medium
Best result:
52 points - Max
44 points - Eldar
32 points - Isaac
Hard
Best result:
36 points - Jelle
20 points - Isaac
16 points - Kevin
Estimation
Best result:
36 points - Kağan
32 points - Consti
28 points - Sondre

Subtraction

Easy
Best result:
396 points - Mert
108 points - Petra
102 points - David
Medium
Best result:
58 points - Eldar
46 points - Max
37 points - CM
Hard
Best result:
48 points - Jelle
34 points - Kevin
18 points - Lizzy
Estimation
Best result:
21 points - Filip
15 points - Irina
11 points - Sam

Multiplication

Easy
Best result:
278 points - Laura
268 points - Boikanyo
220 points - Alex
Medium
Best result:
151 points - Max
79 points - shay
72 points - Bogdan
Hard
Best result:
50 points - Phuc
22 points - Jelle
19 points - Francesco
Estimation
Best result:
25 points - Gabriel
17 points - Tinus
17 points - Filip

Division

Easy
Best result:
1241 points - Laura
494 points - Nils
408 points - Franziska
Medium
Best result:
128 points - Max
64 points - Mia
58 points - Kevin
Hard
Best result:
17 points - Jelle
4 points - Beatrice
3 points - Benjamin
Estimation
Best result:
21 points - Consti
19 points - Filip
19 points - Liza

Percent

Easy
Best result:
466 points - Petra
133 points - Lizzy
108 points - Jonas
Medium
Best result:
320 points - Arthur
151 points - Mia
122 points - David
Hard
Best result:
185 points - Arthur
139 points - CM
87 points - Raphael
Estimation
Best result:
17 points - Filip
11 points - Gabriel
11 points - Irina

Random

Easy
Best result:
322 points - Diego
290 points - Jannik
183 points - Raphael
Medium
Best result:
198 points - Samrudhi
178 points - Max
156 points - Eldar
Hard
Best result:
22 points - kunal
15 points - Michael
11 points - Anna
Estimation
Best result:
57 points - Samrudhi
25 points - Howard
15 points - Brett
Random - Method and Difficulty
Best Result:
15 points - Leonhard
13 points - T
10 points - Bastijn
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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.