About Six Sigma Practice Exams

Six Sigma Practice Exams exists for one job: to make sure that on exam day, nothing on the paper surprises you. The banks are written and maintained by practitioners who have sat and passed Lean Six Sigma Green Belt and Black Belt certification papers and who use the methods commercially — not by a content farm recycling the same fifty questions.

The standard every question is held to

• Body-of-knowledge mapped — every question maps to a DMAIC domain or Black Belt competency that real certifying bodies actually examine.
• One defensible best answer — each item is checked so that exactly one option is right for a stated reason, and the wrong options are the classic traps.
• Explained, always — if we can't explain why an answer is right in two sentences of plain English, the question doesn't ship.
• Honest difficulty — calibrated to the real pass marks (around 70% on most papers), not padded with trivial recall or impossible trick questions.

How we're funded

The 15-question Green Belt sample is free forever, no sign-up. The full banks are one-time purchases (£24 Green Belt, £44 Black Belt) — no subscriptions, no upsell emails, no accounts. You pay once, you revise until you pass.

Questions about a bank, a purchase or a question you think is wrong? Emailteam@sixsigmapracticeexams.com — challenge questions are welcome; corrections ship free.