A Mettl test is an online assessment delivered on Mercer | Mettl, an assessment platform founded in India in 2010 and bought by Mercer in 2018. Employers and universities assemble tests from Mettl's library, so one invitation can mean an aptitude test (for example the General Mental Ability test: 34 questions in 60 minutes), a coding test in Mettl's code editor, the Mettl Personality Profiler (86 items, 20 to 25 minutes), or a mix. Many Mettl tests are remotely proctored. This guide explains the formats, the test screen, the proctoring features as Mettl describes them, and gives original aptitude questions with worked answers.
Key facts
- Vendor
- Mercer | Mettl; founded 2010 in India, part of Mercer since 2018
- Format
- set by the employer; length, sections and difficulty vary
- Aptitude example
- General Mental Ability: 34 questions in 60 min
- Coding
- CodeLysis, DBLysis, FES, Code Project; graded by test cases
- Personality
- Mettl Personality Profiler: 86 items, Big Five, 20 to 25 min
- Proctoring
- none, automated flags, recorded and reviewed, or live; varies by test
- Saving
- answers save automatically
- Connection
- at least 512 kbps for proctored tests
What a Mettl test looks like
Before you start
Mettl's support articles describe this sequence for a proctored test:
- An invitation e-mail from Mettl with a Check System Compatibility button. The system check runs in the background. Mettl advises looking in your spam folder if the e-mail does not arrive.
- Allow webcam and microphone access, then share your entire screen if the test asks for it.
- Fill in the registration fields and accept the terms.
- Capture a live photo of your face, then a photo of your ID, both via webcam.
- Choose which section to start (if the test allows it) and click Start Test. The window switches to full screen, and a consent message about the monitored session appears.
Some tests use the Mettl Secure Browser (MSB) instead of a normal browser. You install it, run the system check again, and take the test inside it.
During the test
- Navigation. "Previous" and "Next" buttons, arrow keys, or the question palette at the top centre. A section drop-down sits top left. If a section is locked, you can't go back to it.
- Timer. Overall remaining time in the top right; section time where the test has timed sections.
- Revisit. Mark a question to review later. Marked questions show in orange.
- Finish. "Finish Test" shows a summary of attempted, unattempted and marked questions. "Yes, End Test" is final.
- Do not refresh. Mettl says refreshing submits your responses. Switching to other windows can trigger a warning or disqualification, and you should not leave full screen.
Aptitude tests
Mettl lists aptitude tests including logical reasoning, cognitive speed, general aptitude, critical thinking, learning agility, numerical reasoning and spatial reasoning. Its General Mental Ability test, for candidates with 0 to 2 years of experience, is listed at 34 questions in 60 minutes, moderate difficulty, in three parts:
| Section | Topics named by Mettl |
|---|---|
| Abstract reasoning | pattern recognition, logical thinking |
| Numerical reasoning | averages and mixtures, ratios and percentages, age problems, profit and loss, time and work, permutations and combinations |
| Verbal reasoning | para jumbles, reading comprehension |
Employers can choose easy, medium or hard questions and build their own tests, so a campus test may look very different (for example, separate quantitative, logical and verbal sections followed by coding). Your invitation's section list is the best guide.
Coding tests
Mettl's coding simulators, as its help centre describes them:
| Simulator | What you do |
|---|---|
| CodeLysis | write back-end code in one of 30+ languages (C, C++, C#, Java, Python, Go, Kotlin, JavaScript/Node, TypeScript, PHP and others); compile and run against predefined test cases |
| DBLysis | write SQL queries against MySQL, PostgreSQL, Oracle, MS SQL or MariaDB |
| FES | front-end tasks with HTML, CSS, JavaScript and jQuery tabs and a live result tab |
| Code Project | a small application in an IDE with a project tree and database connection |
Each test case carries a weight, and your score for a question is the sum of the weights of the test cases you pass. So a solution that handles the main case but fails edge cases earns partial credit. Compilation errors are shown in an execution window, and clicking one jumps to the line.
Personality questionnaires
The Mettl Personality Profiler (MPP) has 86 items on a 5-point semantic differential scale: you place yourself between two opposite descriptions rather than agreeing with one statement. It is built on the Big Five (openness, conscientiousness, extraversion, agreeableness, neuroticism) and reports 26 narrower scales. Mettl lists other personality tests too; one Mettl page describes a "Personality Map" test with 175 questions in 45 minutes measuring 28 work facets. Answer honestly and consistently; there are no right answers. See the personality questionnaire guide.
Proctoring, as Mercer | Mettl describes it
Mettl publishes a long list of integrity features. Employers choose which ones apply to a given test, so not every Mettl test uses all of them. According to Mettl's own pages:
| Feature | Mettl's description |
|---|---|
| Proctoring modes | automated flags, live human invigilators, or recordings with automated flags reviewed later by human proctors |
| Visual proctoring | ID and face snapshots; screen and camera snapshots every 60 seconds; recorded webcam video; a 360-degree room check |
| Automated flags | for example face not visible, another person in view, mobile phone detected |
| Audio | voice detection; off by default in Mettl's basic settings |
| Dual camera | a mobile phone as a second camera, with alerts if it disconnects |
| Secure browser | lockdown mode that blocks other applications; admin-approved applications only |
| Browsing tolerance | counts how often you leave the test window; past the limit the test ends |
| Authentication | e-mail, one-time password to a mobile phone, official ID |
| Other controls | fixed access time slots, IP address restrictions, supervised resume after a disconnection, copy-paste and print-screen blocked, a background watermark, randomised questions and options |
| Report | a "Credibility Index" summarising flagged events and their duration |
What this means for you as a candidate: run the system check a day early, have your ID ready, use a quiet room with nobody else in it, close other applications, turn off notifications, keep your face visible, and stay in the test window. If the invitation asks for a phone as a second camera, charge it and set it up before you start. Arrange any adjustments with the employer in advance.
Original Mettl-style aptitude questions
These items are written for this guide in the topics Mettl names. They are not Mettl items.
Numerical
N1. Profit and loss. A trader buys 50 kg of rice at €1.60 per kg. 10 % spoils, and she sells the rest at €2.00 per kg. What is her profit as a percentage of cost? (A) 10 % (B) 12.5 % (C) 20 % (D) 25 %
Answer: (B). Cost 50 × 1.60 = €80. She sells 45 kg × €2.00 = €90. Profit €10 ÷ €80 = 12.5 %. (D) ignores the spoilage.
N2. Time and work. A can finish a job alone in 12 days, B in 18 days. How long do they take working together? (A) 6 days (B) 7.2 days (C) 7.5 days (D) 15 days
Answer: (B). Per day they do 1/12 + 1/18 = 3/36 + 2/36 = 5/36 of the job, so 36 ÷ 5 = 7.2 days. (D) averages the two times.
N3. Mixtures. How many litres of water must be added to 30 litres of a drink that is 40 % juice to make it 25 % juice? (A) 12 (B) 15 (C) 18 (D) 20
Answer: (C). Juice stays at 30 × 0.4 = 12 litres. For 25 %, the total must be 12 ÷ 0.25 = 48 litres, so add 18.
N4. Ages. A mother and daughter are 50 years old together. Five years ago, the mother was seven times as old as her daughter. How old is the mother now? (A) 35 (B) 40 (C) 42 (D) 45
Answer: (B). M + D = 50 and M − 5 = 7(D − 5), so M = 7D − 30. Then 8D − 30 = 50, D = 10, M = 40. Check: five years ago 35 and 5.
N5. Permutations. In how many different orders can the letters of LEVEL be arranged? (A) 20 (B) 30 (C) 60 (D) 120
Answer: (B). 5! = 120, divided by 2! for the two Ls and 2! for the two Es: 120 ÷ 4 = 30.
Verbal
V1. Para jumble. Put the sentences in the most logical order.
- P: As a result, the city now plans to extend the scheme to three more districts.
- Q: Two years ago, the city introduced a weekly food-waste collection in one district.
- R: Within a year, the general waste sent to landfill from that district fell by a fifth.
- S: Residents received a small kitchen bin and compostable bags free of charge.
(A) QSRP (B) SQRP (C) QRSP (D) QRPS
Answer: (A). Q introduces the scheme; S gives its details; R reports the result; P begins with "As a result", so it must follow R. S cannot open the paragraph because "residents" of what is not yet clear.
V2. Reading comprehension. "Many firms measure how quickly support tickets are closed. But a fast close is not always a good one: if a customer reopens the ticket or calls again within a week, the problem was not solved. A growing number of support teams therefore track first-contact resolution, the share of issues solved without any follow-up contact."
Which statement best summarises the passage? (A) Support teams should close tickets faster. (B) Closing speed alone can hide unsolved problems, so some teams also measure whether issues are solved first time. (C) Customers prefer phone support to tickets. (D) All support teams now use first-contact resolution.
Answer: (B). (A) is the view the passage questions; (C) is never discussed; (D) overstates "a growing number".
Abstract and logical
A1. Series. A1, C4, E9, G16, ? (A) H25 (B) I25 (C) I20 (D) J36
Answer: (B). The letters skip one each time (A, C, E, G, I); the numbers are squares (1, 4, 9, 16, 25).
L1. Coding-decoding. In a code, PLAN is written QMBO. How is LOAD written? (A) MPBE (B) KNZC (C) MPCE (D) NQCF
Answer: (A). Each letter moves one place forward: L→M, O→P, A→B, D→E. (B) moves backwards.
Coding (original, CodeLysis-style)
Task: write a function that returns the second-largest distinct value in a list of integers, or −1 if there is none.
def second_largest(nums):
first = second = None
for x in nums:
if first is None or x > first:
second, first = first, x
elif x != first and (second is None or x > second):
second = x
return second if second is not None else -1Worked check against test cases: [4, 1, 4, 3] → 3; [5, 5] → −1 (no second distinct value); [−2, −7] → −7; [] → −1; [7] → −1; [3, 3, 2, 2, 1] → 2. The duplicate and empty cases are where simple solutions (sort and take the second element) lose test-case weight: sorting [5, 5] gives 5, not −1.
Traps and how to avoid them
- Unseen sections. Mettl tests are often built by the employer. Read the section list and timer on the first screen, and plan your time before you start.
- Locked sections. If sections lock when you leave them, finish and review each one before moving on.
- Refreshing the page. Mettl says this submits your responses.
- Spoilage, returns and "of the rest". Profit and mixture questions hide a quantity that changes.
- Averaging rates. In time-and-work questions, add the work per day; never average the days.
- Pronoun clues in para jumbles. "As a result", "this", "they" can't open a paragraph.
- Edge cases in coding. Empty lists, duplicates, negatives and single elements are typical hidden test cases.
- Set-up stress. A failed system check five minutes before the deadline is the most avoidable problem.
How to prepare for a Mettl test
| Day | What to do | Time |
|---|---|---|
| 1 | Run the system check from your invitation; note whether the test uses the secure browser, a second camera or screen sharing. | 15 min |
| 2 | Numerical topics: profit and loss, percentages, time and work, mixtures, ages, permutations. 20 items. See the numerical reasoning guide. | 60 min |
| 3 | Verbal: 10 para jumbles and 5 reading passages. See the verbal reasoning guide. | 45 min |
| 4 | Abstract and logical: letter-number series, codes, syllogisms. See the inductive and deductive guides. | 45 min |
| 5 | If coding: two timed problems (about 20 minutes each) in your chosen language; write your own edge-case tests. | 60 min |
| 6 | Full timed mock with the section mix in your invitation; practise using the Revisit mark. | 60 min |
| Test day | Quiet room, ID ready, charger plugged in, notifications off, other apps closed. | — |
Sources
- Mercer | Mettl help centre, "Attempting a proctored test" (steps, 512 kbps, navigation, Revisit, refresh submits): https://support.mettl.com/portal/en/kb/articles/attempting-a-proctored-test-new-ui
- Mercer | Mettl help centre, "Anti-cheating measures in Mercer | Mettl system" (secure browser, browsing tolerance, 60-second snapshots, automated flags, OTP, IP restrictions, watermark, randomisation): https://support.mettl.com/portal/en/kb/articles/proctoring-basics-23-6-2020
- Mercer | Mettl, online remote proctoring (proctoring modes, dual camera, three-point authentication, Credibility Index): https://mettl.com/en/online-remote-proctoring/
- Mercer | Mettl, aptitude tests (test list, formats)
- Mercer | Mettl, General Mental Ability test (34 questions, 60 minutes, sections and topics)
- Mercer | Mettl help centre, "All about coding simulators in Mettl" (CodeLysis, DBLysis, FES, Code Project, test-case grading): https://support.mettl.com/portal/en/kb/articles/all-about-coding-simulators-in-mettl
- Mercer | Mettl, Mettl Personality Profiler (86 items, 5-point semantic scale, Big Five, 26 scales, 20 to 25 minutes): https://mettl.com/en/personality-profiler-test/
- Mercer | Mettl, personality test page ("Personality Map": 175 questions, 45 minutes, 28 facets)
- Wikipedia, Mettl (founded 2010 by Tonmoy Shingal and Ketan Kapoor, Gurgaon)
- Avendus, sale of Mettl to Mercer (2018)

MSc Psicologia, 7 anni di test fatti.
Ultimo aggiornamento: Oct 1, 2026