Get Your Mental Math Skills up to Speed

Mental math is make-or-break for interviews at firms like McKinsey, BCG, and Goldman Sachs. This interactive training tool helps you master the basics quickly and effectively.
How the mental math tool works
Choose a math operation and a difficulty level.
Complete the tests, earn points, and track your progress.
Check how you compare to the community average and secure a spot on the leaderboard.
Do your mental math skills need a little update?
Sign up now for free and practice with our Mental Math Tool.
Addition
Easy
Top 3
461 points - Jorge
380 points - kuba
334 points - Petra
Medium
Top 3
59 points - David
59 points - Yulia
50 points - Umay
Hard
Top 3
47 points - Jelle
37 points - Tom
33 points - cookie
Estimation
Top 3
51 points - hoch
38 points - Amy
35 points - Igor
Subtraction
Easy
Top 3
246 points - William
232 points - Navruz
222 points - Marvin
Medium
Top 3
62 points - William
58 points - Мишган
56 points - Max
Hard
Top 3
64 points - Tom
46 points - Jelle
30 points - Daisy
Estimation
Top 3
27 points - nicolas
25 points - Amy
24 points - Albert
Multiplication
Easy
Top 3
2026 points - Irham
1942 points - Rishi
1711 points - hafiz
Medium
Top 3
320 points - Anastasia
154 points - Max
108 points - RaylogVT
Hard
Top 3
47 points - Phuc
20 points - Michi
20 points - Federico
Estimation
Top 3
118 points - Nargiz
79 points -
33 points - Rishi
Division
Easy
Top 3
1013 points - Vivian
1000 points - Phongbhol
1000 points - Leepo
Medium
Top 3
670 points - Yulia
502 points - RaylogVT
193 points - Alexander
Hard
Top 3
20 points - Gourav
13 points - Phongbhol
13 points - Jonas
Estimation
Top 3
54 points - Rishi
28 points - Victor
27 points - Francois
Percent
Easy
Top 3
1111 points - Arthur
674 points - Gideon
500 points - Maximo
Medium
Top 3
352 points - RaylogVT
197 points - David
175 points - María
Hard
Top 3
841 points - David
400 points - Camille
325 points - Arthur
Estimation
Top 3
22 points - Rishi
21 points - Jason
20 points - M
Random
Easy
Top 3
675 points - Jecky
467 points - Armin
337 points - Callum
Medium
Top 3
715 points - Yulia
218 points - Samrudhi
146 points - Jonas
Hard
Top 3
37 points - cookie
28 points - Jonas
24 points - David
Estimation
Top 3
51 points - Samrudhi
40 points - Jin
23 points - Rishi
Random operation and difficulty
Top 3
19 points - Yulia
17 points - Jin
16 points - Isabella

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.