Speed up Mental Math 5 times in 1 Week. It Works!

Are you unsure of how to master #consultingmath?
Are you struggling with complicated numbers?
Are you tired of doing quick big calculations?
If your answer is YES, then this #mentalmath video is definitely handcrafted for you!
If you wonder, I used to be you when I was a newbie in #managementconsulting! One of my biggest fears growing up was to be forced to do #mentalmath in pressured situations. I was really bad at negotiations that involved complicated numbers. I always got beaten in all mental math games. And… eventually, I forever failed and math was my biggest weakness.
But once becoming a #McKinsey #consultant by making the qualitative part compensate, the reality hit me hard, and I had no other options than to dominate all #consultingmath games.
So over time, I have developed a system of doing Math so fast in the head. After one week of intensive practice, and I became the fastest to calculate numbers among #consultants in the team. I even beat my own EM. So what’s the secret?
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SUGGESTED SOURCES:
Consulting Math Fundamentals:

How to Calculate 300% Faster in Case Interviews:
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Hope to see you in the next video!
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Timestamps
0:00 Intro
1:23 What is Consulting Math?
2:26 Method to do Consulting Math
3:22 Multiplication type
8:33 Division type
11:26 Percentage type
14:30 Summary - Outro

[zenvd]

For percentages, you can also break percentages down into ones and tens i.e. 32% is 10%x 3 and 1% x 2.

So in the example above:
32% of 651, 040
10% of 651, 040 = 65104 = ~ 65, 000 x 3 = 195, 000
1% of 651, 040 = 6510.4 = ~ 6500 x 2 = 13, 000
Add that up and you get 208, 000

[ZenityStudios]

most people know that 1.66 * 3 = 5 hahaha never knew anyone knew that

[ehsansharif]

Mental math was my weak point. You saved my life! Thank you.

[junpyogoo]

Thought I was hopeless in mental math until finding yours! Keep uploading great videos like this! Thumbs uppp

[ianm]

A better explanation on the downward and upward rounding during the multiplication portion would have been appreciated.

[alexandrahernandez]

Great video. I am an industrial engineering student, yet I never had to challenge myself with mental math. My grandfather was very good at it given his years in sales. I have an interview approaching and this was good preparation.

[NguyenPham-ihhy]

Glad you are back Kim, I was starting to run out of videos to watch... Great job on this one!

[trina]

I dont understand how are you taking out zeroes in the multiplication part. can you please explain more on this?

[johnanon]

Suggest another mental math method we do in China. 1700 * 40%, for example, can be divided into 1000*0.4+700*0.4 and further divided into 1000*0.4+100*0.4*7 which equals to 400+280

[swarnapuri]

Thanks a lot for posting. Very clear explanation. Everyone should know this method. This should be thought in school.

[omorontherun]

Ahh, finally you are back with some amazing tips bro.

[Amademad]

This is extremely practical, thank you very much for sharing such techniques!!

[madk]

The adjustment's are difficult to determine

[Vinank]

This is extremely well guided method...thank you very much!

[kiddclutch]

How do you adjust? It is difficult to grasp the adjusting part?

[samael]

so did anyone actually get the answer in 5 seconds?

[trangta]

damn this is crazy! so easy and practical.

[josemunozjlm]

eye opening! thank you! sharing and liking!

[joewashington]

For the multiplication portion, I don't understand what you mean of taking the zero's out. Could you elaborate a bit more?

[jensenraylight]

Thanks for sharing this,
The tips was very helpfull

Yeah, i get fear too when get into the situation that require me to fast calculate

I want to build confidence in mental math