- Overview: What the NLN PAX (NEX) Actually Tests
- Verbal Domains: Word Knowledge and Reading Comprehension
- Mathematics Domains: Four Content Areas
- Science Domains: The Largest Section
- Domain Weight Comparison Table
- How Domain Performance Feeds Into Your Score
- Sequencing Your Prep Around the 11 Domains
- Registration and Test-Day Notes Tied to Domain Structure
- Frequently Asked Questions
- The NLN PAX (NEX) has 11 scored content domains across Verbal, Mathematics, and Science.
- Science is the heaviest section at 38% of scored items, with Biology alone worth 14%.
- Verbal (34%) splits evenly between Word Knowledge and Reading Comprehension at 17% each.
- Mathematics (28%) includes a Data and Information domain added when PAX transitioned to NEX.
Overview: What the NLN PAX (NEX) Actually Tests
The exam commonly still called the "NLN PAX" is now formally the Nursing Entrance Exam (NEX), the National League for Nursing's replacement for the legacy Pre-Admission Examination as of February 11, 2024. Nursing programs that reference "NLN PAX" in their admissions materials are, in practice, now administering the NEX, and PAX scores earned before June 2024 are still honored by many schools during a transition period. If you're unsure which version your target program requires, our NLN PAX Requirements guide walks through eligibility and program-specific expectations in detail.
Structurally, the exam is built as a Linear-On-The-Fly Test, meaning every candidate receives a unique form assembled to the same content blueprint rather than a fixed, static test. That blueprint is organized into 11 content domains spread across three subject tests: Verbal, Mathematics, and Science. Understanding exactly how those 11 domains are weighted is the single most useful thing you can do before you start studying, because it tells you where your prep hours produce the biggest score gains.
Verbal Domains: Word Knowledge and Reading Comprehension
The Verbal subject test contributes 34% of the scored exam and is delivered as 50 scored items (plus 8 unscored pilot items) within a 60-minute session. It splits into two domains of equal weight.
Domain 1: Verbal - Word Knowledge (17%)
This domain measures your ability to identify correct definitions and near-synonyms, often for terms with clinical or academic roots. Expect vocabulary drawn from general academic English as well as words that appear frequently in health and science contexts.
- Root, prefix, and suffix patterns common to medical and scientific terminology
- Precise synonym selection where multiple answer choices seem "close enough"
- Context-independent definition recall, since items are typically standalone rather than passage-based
Domain 2: Verbal - Reading Comprehension (17%)
This domain presents short passages and asks you to extract main ideas, identify supporting details, draw inferences, and understand author purpose or tone.
- Distinguishing stated facts from reasonable inferences
- Locating the main idea versus a supporting or secondary detail
- Reading efficiently under time pressure without rereading entire passages multiple times
Because both Verbal domains are weighted identically, there's no strategic reason to favor one over the other - a balanced approach across vocabulary building and timed passage practice serves you best.
Mathematics Domains: Four Content Areas
Mathematics carries 28% of the scored exam, delivered as 40 scored items (plus 5 pilot items) in a 60-minute block. A basic four-function calculator is built into the testing interface, so mental arithmetic speed matters less than conceptual accuracy. This section looks noticeably different from the old PAX blueprint: physics and extended geometry content were removed during the PAX-to-NEX transition, and a new domain, Data and Information, was added.
Domain 3: Mathematics - Numbers and Operations (8%)
Fractions, decimals, percentages, ratios, proportions, and order-of-operations problems. This is foundational arithmetic applied to dosage-style word problems.
Domain 4: Mathematics - Measurement (10%)
The largest math domain, covering unit conversions (including metric conversions relevant to clinical dosing), time and rate calculations, and basic measurement reasoning.
Domain 5: Mathematics - Algebra (5%)
Solving for unknowns, working with simple equations and inequalities, and translating word problems into algebraic expressions.
Domain 6: Mathematics - Data and Information (5%)
A newer domain focused on reading tables, charts, and graphs and drawing correct conclusions from displayed data - a skill increasingly relevant to real clinical documentation.
Key Takeaway
Since Measurement (10%) outweighs Algebra and Data and Information combined, prioritize metric conversions and rate problems before drilling algebraic manipulation.
Science Domains: The Largest Section
Science is the heaviest subject test at 38% of the scored exam, with 55 scored items (plus 5 pilot items) in a 60-minute block. Five domains make up this section, and their weights are far from equal - Biology alone is worth as much as two other science domains combined.
Domain 7: Science - Biology (14%)
The single largest domain on the entire exam. Expect cell structure and function, genetics basics, and general biological processes.
- Cell organelles and their functions
- Basic genetics (dominant/recessive traits, inheritance patterns)
- Homeostasis and general biological regulation concepts
Domain 8: Science - Human Anatomy (8%)
Structural knowledge of major body systems: skeletal, muscular, cardiovascular, respiratory, and nervous system anatomy.
Domain 9: Science - Human Physiology (8%)
How those same body systems function - circulation mechanics, gas exchange, nerve signaling, and organ-system processes, tested separately from pure anatomy.
Domain 10: Science - Chemistry (3%)
The smallest domain on the exam. Focuses on basic atomic structure, the periodic table, chemical bonding, and simple reactions - not advanced organic chemistry.
Domain 11: Science - Health (6%)
General health literacy topics: nutrition basics, wellness concepts, and health-related terminology that a future nursing student should recognize.
Domain Weight Comparison Table
Here is the full blueprint in one view, useful for building a study plan proportional to actual scoring impact.
| Subject Test | Domain | Weight (Scored Items) |
|---|---|---|
| Verbal | Word Knowledge | 17% |
| Verbal | Reading Comprehension | 17% |
| Mathematics | Numbers and Operations | 8% |
| Mathematics | Measurement | 10% |
| Mathematics | Algebra | 5% |
| Mathematics | Data and Information | 5% |
| Science | Biology | 14% |
| Science | Human Anatomy | 8% |
| Science | Human Physiology | 8% |
| Science | Chemistry | 3% |
| Science | Health | 6% |
Notice that Biology, Word Knowledge, and Reading Comprehension are the three heaviest individual domains on the entire exam. If your prep time is limited, these three deserve first priority, followed by Measurement and the two anatomy/physiology domains.
How Domain Performance Feeds Into Your Score
All items across all 11 domains are four-option multiple choice, there's no penalty for guessing, and unanswered items count as incorrect - so never leave a question blank, even a wild guess beats a skip. The exam totals 163 items in three 60-minute subject tests (three hours total), but only 145 of those are scored; 18 are unscored pilot items mixed in without being flagged, so treat every item as if it counts.
The NLN does not set a universal passing score. Instead, your performance is reported as norm-referenced percentile ranks against separate RN and LPN/VN reference groups (in use since November 1, 2025), and your composite score is the sum of the three subject percentile ranks on a 0-300 scale - where the 50th percentile equals 145 for RN applicants and 143 for LPN/VN applicants. Each nursing program then sets its own minimum requirement. For a full breakdown of how this scoring model works, see our dedicated NLN PAX Passing Score guide.
Beyond the composite, your score report includes a diagnostic Coaching Report that breaks results out both by content domain and by cognitive dimension - Knowledge, Application, Interpretation, and Logic and Reasoning. This means two candidates who both score well in Biology could still have very different underlying strengths: one might excel at recalling facts, while the other is stronger at applying concepts to new scenarios.
Sequencing Your Prep Around the 11 Domains
Because the 11 domains carry unequal weight, your study calendar should mirror the blueprint rather than split time evenly. A domain-weighted approach - spending roughly proportional time on Biology, Word Knowledge, and Reading Comprehension before moving to lighter domains like Chemistry - tends to produce the strongest composite gains per hour studied.
Heaviest Domains First
- Biology (14%): cell structure, genetics, homeostasis
- Word Knowledge (17%): medical root words and academic vocabulary
- Reading Comprehension (17%): timed passage practice
Mid-Weight Science and Math
- Human Anatomy and Human Physiology (8% each)
- Measurement (10%): metric conversions, rate problems
- Numbers and Operations (8%): fractions, ratios, percentages
Lighter Domains and Full-Length Practice
- Algebra and Data and Information (5% each)
- Health (6%) and Chemistry (3%)
- Full timed practice tests covering all three subject tests
For a more detailed week-by-week methodology, including how to use practice-test data diagnostically, our NLN PAX Study Guide expands on this sequencing approach. And if you're weighing how much total prep time to budget in the first place, the Difficulty Guide and NLN PAX Pass Rate breakdown offer useful context on where most candidates lose points.
Registration and Test-Day Notes Tied to Domain Structure
A few logistical details connect directly to how the domains are tested. The exam is a single proctored session - either on campus at an approved institutional testing center or virtually through a live Proctor360 proctor - covering all three subject tests back-to-back in one sitting, so pacing across all 11 domains in sequence matters, not just mastering each domain in isolation.
Pricing effective March 1, 2026 is $59.00 for a school-paid on-campus administration and $80.00 for virtual administration on Proctor360, before any institutional proctor or administration fee. Proctor360 adds a $30 charge for on-demand scheduling inside 48 hours or rescheduling inside 24 hours, and the NLN enforces a strict no-refund policy - so confirm your domain readiness before booking. Full pricing scenarios are covered in our NLN PAX Certification Cost breakdown, and testing windows are detailed in the NLN PAX Exam Dates guide.
Retake policy also ties into domain prep: the NLN requires a minimum 30-day gap between attempts on the same exam unless a school specifies otherwise, and schools commonly cap lifetime attempts. That 30-day window is enough time to revisit weak domains identified in your Coaching Report, but not enough to relearn content from scratch - plan your first attempt accordingly. You can build domain-specific stamina ahead of test day using full-length simulations on our practice test platform, which mirrors the same 11-domain structure described above.
Key Takeaway
Run at least one full three-hour practice simulation covering all 11 domains before test day - pacing across Verbal, Math, and Science back-to-back is different from studying each subject in isolation.
If you're still confirming basic eligibility - a high school diploma or GED is the only prerequisite - our Requirements guide covers that alongside program-specific score minimums. And for a broader orientation to the exam itself, including how it relates to nursing program admissions and hiring pipelines, see What Is NLN PAX? Once you're ready to test your domain-by-domain readiness under realistic timing, start a full practice exam to see how your scores map to the weighted blueprint above.
Frequently Asked Questions
There are 11 scored content domains total: two under Verbal, four under Mathematics, and five under Science, spread across three 60-minute subject tests.
Biology, at 14% of the scored exam, is the largest individual domain. Word Knowledge and Reading Comprehension each follow closely at 17% of their respective section, but Biology carries the most weight within Science overall.
Yes. Physics and extended geometry content were removed, and a new Mathematics domain, Data and Information, was added to reflect data-table and graph-reading skills.
The NLN itself sets no universal passing or failing mark on any domain. Scores are reported as percentile ranks, and individual nursing programs set their own minimums for admission.
No. Because domain weights range from 3% (Chemistry) to 17% (Word Knowledge and Reading Comprehension), allocating study time proportionally to each domain's weight produces better composite score gains than equal-time studying.