BCG tests numbers early: a short numerical assessment in London and Casey's online case elsewhere
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BCG London asks internship applicants to complete a short numerical assessment as part of the application, before first-round case interviews. Other BCG offices describe an Online Case Experience in which a chatbot called Casey guides you through a business case. BCG says its cases always include a quantitative portion.
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By the LifeScore Editorial Team · Updated · How we check facts
How close is this practice test to the BCG test?
BCG London says internship applicants complete a short numerical assessment as part of the application, and BCG says its cases always include a quantitative portion. Our reasoning test drills reading tables and charts and working percentages quickly, the arithmetic underneath both.
BCG does not describe the London numerical assessment's length or format on the pages we read, and our test is not a copy of it. The Online Case Experience with Casey, used in some offices, is a guided business case with written and video answers, which a reasoning test only partly prepares you for.
It is a Reasoning-style test: 50 original questions in 45 minutes. Check the test name in your invitation email before you decide how to prepare.
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Practise for the BCG London numerical assessment
BCG London asks internship applicants to complete a short numerical assessment, and says every case has a quantitative portion. Timed table and chart mocks train both.
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BCG: the assessment at a glance
| London internship | Online application with CV, then a short numerical assessment |
| First round in London | Case-based discussions with senior members of the London consulting team |
| Online Case Experience | A business case guided by Casey, a chatbot, in some offices |
| Online case length | About 30 minutes, on BCG's Mexico page |
| Video element | A 1-minute recorded answer at the end, on one regional page |
| What the case assesses | Problem solving and analytical skills |
| Interviews | Cases always include a quantitative portion, BCG says |
| Pass mark | Not published |
The BCG stages, and who says so
Every stage is marked by its source. Stated means the employer says it on its own pages. Candidates report means we found it only in candidate accounts and prep guides.
- 01
Online application
Stated by BCG
Your CV and application details - 02
Short numerical assessment (London internship)
Stated by BCG
Numerical reasoning, as part of the applicationBCG does not describe its length or format on the London page we read. - 03
Online Case Experience with Casey (some offices)
About 30 minutes on the Mexico pageStated by BCG
An interactive business case with quantitative and qualitative questions, guided by a chatbotOne regional page adds a 1-minute video answer at the end. Not every office uses it. - 04
Case interviews
Stated by BCG
Case-based discussions that test numerical skills, business knowledge and communication
London starts with a numerical assessment
BCG London describes its summer internship for penultimate-year students in four steps: apply online with a CV, complete a short numerical assessment that forms part of the application, pass a final CV review, then attend first-round interviews with case-based discussions.
The word short is the only description BCG gives. Prepare for speed and accuracy with mental arithmetic, percentages and growth rates, and with reading a chart in seconds. Our free reasoning test is a timed set of exactly those skills.
Casey, the chatbot that runs a case
Several BCG office pages describe the Online Case Experience: an interactive exercise in which you solve a business case guided by Casey, a chatbot. BCG's Mexico page says it takes about 30 minutes and is run in English, and that it simulates a case interview to evaluate problem solving and analytical skill.
A regional BCG page adds that the case mixes quantitative and qualitative questions and ends with a 1-minute video of you answering one qualitative question. Practise saying a recommendation and its main reason in under a minute.
What the older online case looked like
An older BCG practice booklet, from the French office in 2019, described an online case of 23 questions to finish in no more than 45 minutes, assessing business judgement, logical reasoning and quantitative aptitude. That format has probably changed, but the skills it lists are the same ones BCG names today.
The booklet is still useful as practice for reading exhibits and estimating quickly. Work through it on a timer, then check which questions took more than two minutes. Those are the ones to practise.
Every case has a number in it
BCG's case preparation page says you will be presented with a realistic business challenge, that there is not always a single right answer, and that cases always include a quantitative portion, often drawn from real client work. For client-facing roles, it says the interview tests numerical skills, business knowledge and communication style.
BCG encourages practising case interviews with another person. Pair that with a daily 10-minute arithmetic drill, so that the maths never distracts you from the structure of your answer.
Offices differ, so read your own
BCG's pages show regional variety. Germany and Austria describe two rounds over two days with an online cognitive test and a case. North America describes up to two rounds of two interviews each. London describes the numerical assessment above.
Read the page for the office you are applying to before preparing. Our numerical reasoning guide and case study guide cover the two skills that every version shares.
Practise the skills BCG asks for
50 original questions, 45 minutes, scored the moment you finish. Free, no sign-up. Not the BCG test.
Start the free Reasoning testA simple prep plan for BCG
- 01
Take the free Reasoning test first
It takes 45 minutes and shows where you stand before you spend a single hour on revision. See what the Reasoning test covers. - 02
Read the stages that apply to you
The comparison guides below line BCG up against other employers for each stage type, so you can see what is stated and what is only reported. - 03
Add timed mocks if you want a full course
The Reasoning Pass Pack adds timed mocks, topic drills, a score predictor and a study plan. It is £29 (US$39) for this exam, one payment and no subscription. Applying to several employers? The Employer Assessment Bootcamp opens every employer-style test for 60 days for £59 (US$79). Your free score comes first, so you can decide with a number in hand.
Tips for the BCG assessment
- 01
Drill fast arithmetic
London's first test is numerical, and every case has numbers. - 02
Practise a one-minute answer
Some online cases end with a short recorded answer. - 03
Time yourself on the old booklet
23 questions in 45 minutes is still good exhibit practice. - 04
Practise cases with a partner
BCG recommends it. - 05
Read your office's page
The stages vary between regions.
Frequently asked questions
Does BCG have an online test?
What is BCG Casey?
How long is the BCG online case?
Do BCG case interviews include maths?
Is there a video in the BCG online case?
What score do I need on the BCG assessment?
Is this the BCG test?
Sources
Checked November 2026, through search summaries of BCG's own pages. We did not read them in full. BCG does not describe the London numerical assessment's length or format, and we could not confirm whether London also uses the Casey online case, so we have kept the offices apart.
Guides that cover BCG
- Numerical reasoningNumerical Reasoning Tests at Graduate Employers, Compared
- Video interviewsRecorded Video Interviews at Employers: Formats and Rules
- Case studies and written tasksCase Studies and Written Tasks in Graduate Hiring Compared
- Accountancy, consulting and professional servicesBig Four and Mid-Tier Firm Online Assessments Compared
- How long each assessment takesHow Long Are Graduate Online Assessments? Stated Times Compared
- Graduate scheme online testsGraduate Scheme Online Tests 2027: Every Employer, Stage and Provider
Other employer assessments
- Thomas GIA assessmentFive short tasks, with sources split on timing: Thomas's booklet says about 30 to 45 minutes; some prep sites say 12.
- Korn Ferry Talent Q assessmentElements and Aspects are different tests, each question has its own timer, and sources disagree on which one adapts.
- Deloitte assessmentA behavioural half plus numerical and verbal reasoning, with no overall time limit and no AI.
- KPMG assessmentA 36-minute cognitive test of numerical and logical reasoning, after an untimed skills assessment.
- PwC assessmentBehavioural and timed cognitive assessments, then an on-demand video interview.
- EY assessmentPublishes a quick guide to its numerical test, though its pages differ on 20 or 30 minutes.
- Assessment guidesCompare employers by test type, sector and topic
- All employer assessmentsEvery employer page, with what each says and what candidates report
LifeScore is not affiliated with BCG. Their names and trademarks belong to their owners and appear here only to describe a hiring process. This page rests on what BCG publishes and what candidates report, and BCG has not reviewed or endorsed it. Our practice test uses original questions in a similar style and is not the BCG test. LifeScore is not affiliated with SHL or any test publisher. SHL is a trademark of its owner. Our practice tests are original questions written in a similar style (tables of business data, and passages with True, False or Cannot say statements) and are not the real tests. Reviewed November 2026 by the LifeScore Editorial Team.