When Rereading a Stem Is Worth the Seconds

The clock is not what you think it is

Per NCSBN, the exam runs for five hours in total, including the introductory screen and all breaks, and there is no time limit on any individual item. Nothing on the screen is counting down against one question.

That matters because the fear of the clock drives more wrong answers than the clock does.

NCSBN's 2025 examination statistics put some numbers on it. For the RN exam that year, the average test length was 103 items and the average testing time was 2 hours 14 minutes, with 0.5% of candidates using the maximum time available. For the PN exam, the averages were 100 items and 2 hours 18 minutes, with 0.7% using the maximum.

Read those two figures next to the five-hour limit. There is room.

That is not permission to reread everything. It is permission to reread when there is a reason, without feeling like you are stealing time from your future self.

Four signals that justify a second read

Rereading on a vague feeling of unease is not a strategy. These four are specific and you can check them in a second.

• You cannot say, in your own words, what the stem is asking you to do.
• Two options look identical to you and you are about to choose by feel.
• You noticed a negative word late. Except, contraindicated, avoid, least, and unlikely all invert the task, and catching one after you started evaluating options means you evaluated them against the wrong question.
• A number, unit, age, or setting went past without registering. A value in mEq/L versus mg/dL is a different fact, and a client's age or care setting frequently decides the answer on its own.

Any one of those is enough. None of those is present and you are just anxious? Answer and move on.

The first signal is the one that matters most, and it is the entire subject of what a question stem is actually asking you to do.

How to reread without restarting

Rereading badly costs real time and usually produces the same answer. Rereading well is targeted.

Do not go back to the top of the scenario. Read the final sentence of the stem, which is where the task and the discriminating word almost always live.

Then read only the data lines. Vital signs, lab values, the sentence describing what changed. Skip the background, the admitting history, and the social details unless the final sentence pointed at them.

Do not re-evaluate options you already eliminated with a stated reason. That reason is either still true or it is not, and rereading it does not settle which. If you eliminated by feel, that is a different problem and eliminating distractors on rationale is the fix.

Cap it at one reread. If a second pass has not moved you, a third will not either.

The exception is the negative word. If you caught an except or a least on the reread, you are not rereading, you are answering a different question than the one you started, and you should work the whole option list again from the top.

That is the one case where starting over is correct. It is also the cheapest miss to prevent, since scanning the final sentence for a negative before you look at options costs about a second.

Why the absence of a per-item limit changes your behaviour

Two behaviours follow directly from the rule, and both are worth building before exam day.

The first is that a hard item does not need to be rushed. The exam adapts to what you are doing rather than to how fast you did it, so buying yourself twenty seconds on a genuinely hard item costs almost nothing across an exam of around a hundred items.

The second is subtler. Because the clock is per exam rather than per item, the correct response to falling behind is not to speed up on hard items. It is to stop lingering on items you have already settled.

Most lost time is not spent rereading hard stems. It is spent revisiting an answer you have already reasoned to, which is where doubt does the most damage and produces the least new information.

There is a third consequence, and it is about the shape of the exam rather than the clock. Per NCSBN, every exam includes 15 unscored pretest items that are indistinguishable from the scored ones, so a strange item is not evidence that anything has gone wrong.

You cannot tell which is which. Nobody can. Treat every item the same way and the question of which ones counted stops being available to worry about.

Where this fits with your overall pacing

Reread decisions are small. Break planning, arrival time, and how you spend the first ten minutes are the larger levers, and they are set before you sit down. Five hours including breaks and planning your exam clock handles those properly.

If you are testing on the PN exam, the same rules apply and the scope questions layered on top change what a reread should look for. Question analysis with a PN scope in mind covers that.

Build the habit during practice, not on the day

Track it. For a week, mark every item where you reread and write which of the four signals triggered it.

Then check those items against your results. If most of your rereads came from anxiety rather than from a signal, you now know what to cut. If most of the items you missed were ones you should have reread and did not, you know that too.

Either finding is worth having, and the record is what makes it visible. Reviewing a missed question the long way shows how to build that record without turning review into a second study session.