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Best apps for mental maths???

apps Case Maths maths mental math mental maths apps
New answer 21 hours ago
8 Answers
33.4 k Views
J asked on Jul 07, 2019

Hello all,

I am interested to see if anyone is using any apps on their phone to practice mental maths whilst away from the desk.

I have been using "Cool Maths Games" on android. It gives you the option of have the problem presented either visually or via audio and you can answer either via the keypad, multiple choice or by voice.

Please let me know if anyone has any other good recommendations



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Best answer
replied on Jul 08, 2019
McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School


You can use preplounge tool, Viktor Cheng tool, Mimir Math on iOS

Also, I recommend practicing the following:

  • Learn how to multiply double digit numbers (
  • Learn the division table up to 1/11 (i.e. 5/6 = 83.3)
  • Learn how to work with zeros using powers (E.g: 4000000 = 4*10ˆ6)

Good luck with your interviews!

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Antony replied 21 hours ago

Try the Microsoft Math Solver app. You can find it here

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Alex replied on Aug 16, 2022

Check out ConsMath app on IOS. 

It has estimation math mode which is helpful for consulting. Always using it while in subway.

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Content Creator
replied on Oct 16, 2023
Ex-BCG Principal | 8+ years consulting experience in SEA | BCG top interviewer & top performer

When I was practicing, I used “Brain Training: Mental Calc” on iOS. This was useful for on the go.

On the laptop, plenty of online ones available, and I also created my own random excel math problem generator.


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Content Creator
replied on Nov 16, 2020
McKinsey | Awarded professor at Master in Management @ IE | MBA at MIT |+180 students coached | Integrated FIT Guide aut


Have you tried Fast Math in PrepL?

Hope it helps!



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Kaylee replied on Mar 13, 2023

Thanks for sharing about the Cool Maths Games app for practicing mental maths. Another app you can try is ""Math Workout.""

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Jacob replied on Mar 12, 2022

Try MentalMathTrainer at -- it allows you to choose how many digits you want for each factor for the type of arithmetic you want to do, and also features an express mode which gives you increasingly complex problems as you score correctly.

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Anonymous replied on Jul 22, 2020

Dear J,

I can recommend you the following apps and tools:

• Victor Cheng’s math tool (Magoosh's mental maths app, Mental math cards challenge app etc).

• And here is math app for practicing math fractions and percentages from one of PL participant

• Also, there is a tool provided by PrepLounge (

Wish you good luck,


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Kheireddine replied on Jul 07, 2019
No preplounge cases
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Vlad gave the best answer


McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School
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