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Addition

Easy
Best Result:
104 points - Lolo
103 points - danny
96 points - ben
Medium
Best Result:
80 points - ravi
26 points - Ethan
23 points - danny
Hard
Best Result:
27 points - Jelle
23 points - Alexandr
23 points - Tom
Estimation
Best Result:
29 points - Elias
28 points - danny
21 points - Christian

Subtraction

Easy
Best Result:
255 points - danny
180 points - ivel
165 points - Tomás
Medium
Best Result:
48 points - danny
27 points - Ethan
27 points - Henri
Hard
Best Result:
31 points - Tom
26 points - Ethan
17 points - Matt
Estimation
Best Result:
31 points - danny
13 points - Igor
10 points - Christian

Multiplication

Easy
Best Result:
1755 points - Angela
1194 points - Lolo
721 points - Martin
Medium
Best Result:
208 points - Atos
49 points - Ethan
48 points - Josh
Hard
Best Result:
48 points - Phuc
16 points - Harald
6 points - ivel
Estimation
Best Result:
28 points - Elias
21 points - Jens
15 points - Christian

Division

Easy
Best Result:
1000 points - Matteo
800 points - danny
411 points - Enrico
Medium
Best Result:
55 points - Ethan
45 points - Josh
38 points - Matteo
Hard
Best Result:
1 point - Moritz
Estimation
Best Result:
23 points - Jens
19 points - Christian

Percent

Easy
Best Result:
184 points - danny
165 points - Tomás
150 points - Matteo
Medium
Best Result:
61 points - Marc
60 points - Lisa
53 points - Feli
Hard
Best Result:
35 points - ivel
32 points - Elizaveta
27 points - pinda
Estimation
Best Result:
54 points - RaylogVT
10 points - Marin
8 points - Marc

Random

Easy
Best Result:
611 points - danny
464 points - Yassine
459 points - David
Medium
Best Result:
412 points - David
125 points - Oskar
117 points - Samrudhi
Hard
Best Result:
14 points - Presiyana
11 points - Brett
7 points - AH
Estimation
Best Result:
19 points - andrey
17 points - Antonio
14 points - Saikat
Random - Method and Difficulty
Best Result:
9 points - Jens
7 points - Joseph
4 points - Deborah
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Practice Your Consulting Mental Math for Free

Fast and accurate mental math is a necessary requirement to pass your job interview at consulting companies like McKinsey, BCG or Bain. Therefore, you should invest regular time in training your case math skills. Find out more about why good math skills are so important for your case interview in our Case Interview Basics article about fast math.

This Is How the Mental Math Tool Works

Choose one of the 24 tests above to check and improve your case math skills for free. You can take a test as many times as you want and see how you improved over time. Check out how you perform compared to other candidates. The top 3 ranking is recalculated monthly which means that you have the opportunity to climb the winners' podium every month. All other values (your average, all users average and your best results) are all-time values.

Mental Math Practice – Train Your Math Skills for Your Case Interview in Consulting

Use our interactive and user-friendly mental math tool to train your case interview math with respect to all basic operations (e.g. addition, multiplication, percentage). By comparing your performance to the overall PrepLounge community, you can improve your case math skills and make sure that you will be prepared for any calculations in your consulting interview.