Hi Anonymous, as general practice for the PST, I would recommend the following approach: Try to find at least 5-6 practice cases online. There are several available for free, if needed you ca... (more)

# All questions tagged Math problem - Consulting Q&A - PrepLounge.com

Hi! I have written this earlier, and I will repeat it: the obsession with "Mental Math" is one of the many damaging nonsense myths that are flying around! Mental math is simply not something that i... (more)

Hi! The market size of a player in this graph is equal to the area of all its squares. Just by eyeballing it you should be able to say that RetailCo is the market leader and Player A is the number... (more)

Hi, I recommend going through the GMAT math part and practice the equations there. There are many good books on that. Best

I don't think there's any hard & fast rule. If I feel like the math is getting a little more complex, or I have too many numbers to keep track of, I always err on the side of caution: better go a... (more)

Hi Anonymous, in general, the main issues with big numbers is forgetting zeros during operations. Potential tips to deal with big numbers are the following: Use correctly 10^ powers in your m... (more)

Hi Jana, It won't work where you have really ugly numbers but one trick to keep in mind is the 'invert and multiply'. So to use your case: 0.024/0.08 = (0.024/1) / (4/5)... (more)

20% margin means C = 0.8*P. If new price is 0.95*old price, then new margin is 0.95*P - 0.8*P=0.15*P, so your new margin is 15%. New volume * P * 0.15 = Old volume * P * 0.2 (price is same her... (more)

Not exactly what you are looking for, but i suggest you spend 15-20 minutes a day on caseinterviewmath.com for rapid-fire practice. It will rank you by speed and accuracy as well, i used it to grest e... (more)

Hi guys! Just wondering if anyone has tried the FastMath Ace the Case course, and can give feedba... (more)

Hi, Something that helped my candidates - download ALL casebooks available online and go through the math problems in the cases. They will give a good sense of required business terminology. Then y... (more)

Hi, I recommend downloading all possible casebooks you can find. Quickly go through each case but concentrate on solving the math problems that they have. To be honest, the way they solve the case... (more)

Hi, There are several techniques that you can use: 1) Learn how to work with zeros. Best way - always use 10^power instead of zeros Example: 300x9000 = 3*10ˆ2 x 9*10ˆ3=3x9*10ˆ(2+3)=27*10ˆ... (more)

Hi Anonymous, first of all, let me state that one result of proper case interview preparation will be that this question will become completely irrelevant to you. ALL calculations in Consulting cas... (more)

Hi, Here is how you can improve your math skills: 1) Mental math - train, train, and train again Learn how to multiply double digit numbers (https://www.youtube.com/watch?v=6ndkkPZYJ... (more)

Hi Andreia, this is definitely a case where you can apply the rule of 72 to get a rounded answer: Step 1: find the amount of time the initial capital would double. Dividing 72 by 4, you get 1... (more)

Hi Moji, it seems your issue is not the math computation, but rather how to structure the math part once you receive a question (that is, the logic behind that you should apply). This means you sho... (more)

Hi Anonymous, basically here you have to compute (1+x)^a=V where you don’t know x and where a=5 and V=1,5. For relative low interest rates and periods, the simpler process for precise... (more)

Answer should be 5600km. 1. Find total kms where: Avg. BC25 = BC100 (50 + x*0.75)/x = 3000/x 2. Find total kms where: Avg. BC50 = BC100 (200 + x*0.50)/x = 3000/x The larger answer is the corr... (more)