VECTOR PRACTICE LAB / FREE PREVIEW
Number Differences
Remember the last number. Enter the difference. Keep your place.
Try a free preview
Two short previews: each includes two guided examples and five scored answers. Full-length practice and saved progress are included with course access.
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How scoring works
Accuracy = correct answers ÷ submitted answers × 100. Response-speed score = 100 at an average of 0.5 seconds or faster, decreasing evenly to 0 at 3 seconds or slower. Total score = the average of those two scores. Speed includes correct and incorrect answers. These are Vector practice benchmarks, not FAA scoring.
Remember this first number
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ROUND PAUSED
Take a breath.
Your current answers are kept while this page stays open, and the timer is paused. Resume with a fresh starting number; the interrupted question won’t count.
ROUND COMPLETE
Your practice review
— correct · Average response: — · Active session: —
Two guided answers are excluded. Response speed uses all submitted session answers: 0.5 seconds or faster = 100; 3 seconds or slower = 0, with a linear scale between. Total = (accuracy + response speed) ÷ 2. Unanswered questions at the end aren’t scored. Vector practice scores are not official FAA results.
| # | Numbers | Expected | Your answer | Time |
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FULL COURSE FEATURE
See how far you can go.
Track accuracy, response speed, and combined scores across full practice sessions.
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Get full-length exercises, saved scores, progress graphs, and course packets with course enrollment.
Unlock the full course →Monthly: $24.99/month until canceled · Three-month pass: $59.99 once, no renewal. Purchases temporarily paused.
Already have access? Open My Portal →Illustrative graph preview—not your scores or student results. Free-preview results are not saved to course history.