Turn your own official NBME Free 120 PDF into the actual test-day interface: per-block timer,
lab values, mark-for-review, highlight and strikethrough, a per-system weak-spot report at the end,
and a written explanation for every question in review mode.
Drop your Free 120 PDF here, or click to choose
The official PDF from the NBME site. It never leaves your browser.
Private and local. Your PDF is read in your browser to build the test;
nothing is uploaded to a server. The explanations and analytics are bundled with this page;
the questions come only from your own file.
USMLE Step 2 CK — Free 120 Practice
6 blocks of 20 questions, 30 minutes each (90 sec/Q pace). The timer can be paused at any time.
Lab Values reference is available in every block. Each block can be retaken; your answers reset on a new attempt.
USMLE Step 2 CKBlock 1Item 1 of 2030:00
Item 1
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Block 1 complete
Your answers are saved. Scores and the answer key stay hidden until you finish all blocks.
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Answered
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Time spent
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You're on the last question. Continuing will end the block.
Exam complete
— / 120
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Total time
Per-block breakdown
Block
Score
%
Time
Question-by-question review
#
Result
You
Ans
Time
System
Discipline
Topic
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Click any row to open that question with its explanation.
Review — Block 1
Click any item to return to it. The timer keeps running until you submit.
Answered Blank Marked
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Exam format
Block layout
3 × 40 mirrors real Step 2 delivery (40 Q / 60 min). It uses a separate saved attempt, so your 6 × 20 results are untouched. Changeable only from the block menu.
