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Addition

Easy
Best Result:
167 points - Paul
141 points - Lolo
111 points - Matteo
Medium
Best Result:
80 points - ravi
28 points - Ethan
23 points - danny
Hard
Best Result:
29 points - Jelle
29 points - Tom
23 points - Alexandr
Estimation
Best Result:
29 points - Elias
28 points - danny
27 points - Jonathan

Subtraction

Easy
Best Result:
255 points - danny
216 points - Paul
180 points - ivel
Medium
Best Result:
48 points - danny
32 points - Ethan
28 points - Lejna
Hard
Best Result:
39 points - Tom
26 points - Ethan
17 points - Matt
Estimation
Best Result:
31 points - danny
29 points - Elias
22 points - Karl

Multiplication

Easy
Best Result:
1755 points - Angela
1194 points - Lolo
721 points - Martin
Medium
Best Result:
225 points - Atos
63 points - Ethan
48 points - Josh
Hard
Best Result:
48 points - Phuc
16 points - Harald
6 points - ivel
Estimation
Best Result:
172 points - Nargiz
28 points - Elias
27 points - Matteo

Division

Easy
Best Result:
4300 points - Angela
1000 points - Matteo
800 points - danny
Medium
Best Result:
106 points - Ethan
45 points - Josh
38 points - Matteo
Hard
Best Result:
6 points - Ethan
6 points - Matteo
5 points - Yara
Estimation
Best Result:
30 points - Elias
24 points - Matteo
23 points - Jens

Percent

Easy
Best Result:
254 points - Marc
184 points - danny
165 points - Tomás
Medium
Best Result:
62 points - Ethan
61 points - Marc
60 points - Lisa
Hard
Best Result:
79 points - Gesine
50 points - Matteo
39 points - Cecilie
Estimation
Best Result:
54 points - RaylogVT
17 points - Nargiz
12 points - Matteo

Random

Easy
Best Result:
946 points - Petra
611 points - danny
464 points - Yassine
Medium
Best Result:
424 points - David
137 points - Samrudhi
127 points - Oskar
Hard
Best Result:
47 points - Phuc
16 points - Presiyana
15 points - Kirill
Estimation
Best Result:
29 points - Samrudhi
23 points - Antonio
19 points - Elias
Random - Method and Difficulty
Best Result:
14 points - Matteo
9 points - Jens
8 points - Jannik
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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.