Mercer Mettl OA: how the test works and how to practise

Mettl tests are modular. Your employer picks a subset from a fixed catalogue, so the exact combination varies, but the common ones are:

• Quantitative aptitude — arithmetic, percentages, ratios, time-and-work, DI. Usually 15 to 25 questions in 20 to 30 minutes.
• Logical reasoning — series, blood relations, coding-decoding, syllogisms.
• Verbal ability — reading comprehension, error spotting, para-jumbles.
• Data interpretation — tables, pie charts, caselets.
• Domain — coding (for IT), banking awareness (for BFSI), functional MCQs (for FMCG or manufacturing).

Each section usually has its own timer that starts when you enter and cannot be paused. You cannot return to a section once submitted.

Many Mettl variants use adaptive scoring — a correct answer raises the difficulty of the next question and its point value; a wrong answer drops both. That means your final score is not simply correct minus wrong. Two candidates with the same number correct can score very differently.

Almost every recruiter using Mettl sets per-section cut-offs as well as an overall cut-off. Aceing quant while flunking verbal will still eliminate you. Distribute your attempts.

Mettl’s SecureBrowser or lockdown extension disables copy-paste, screenshots, second monitors, alt-tab and browser DevTools. Your webcam feed is recorded and reviewed by AI; suspicious frames (looking away for long stretches, someone else in view, phones in shot) trigger flags on your report.

• A single warning almost never terminates a test.
• Three to five warnings typically auto-submit the section.
• The webcam must stay on for the entire test. Do the exam in a private, well-lit room, facing the light source.

Cut-offs are set per drive and never officially published. Based on candidate-reported data, the pattern is broadly:

• Service companies (TCS iON-style): 60-65 percent overall, with each section above 50.
• Mid-tier IT and BFSI: 70-75 percent overall.
• Product companies using the Mettl coding assessment: one working solution plus solid MCQs.

Do not aim for the cut-off. Aim well above it — the shortlist is often ranked, not just filtered.

• Day 1: full mock in the exact section format your recruiter has confirmed.
• Day 2: quant — one hour of arithmetic, one hour of DI.
• Day 3: logical reasoning — series, blood relations, coding-decoding.
• Day 4: verbal — three RCs and one hour of error spotting.
• Day 5: your domain module. For coding, five easy and two medium problems.
• Day 6: a second full mock. Check pacing, not just accuracy.
• Day 7: set up your webcam, close every unrelated app, and rest.