119 tests · 11 categories
AI & data tests
Every test starts with a short course and ends with a quiz. Missed questions come back with the right answer and why it is right. No account and no timer.
13 tests
- Easy
Understanding AI
What machine learning actually does, what a language model is, and where both fall down.
8 questions7 min - Medium
Data analysis
Averages, spread, correlation and the traps that make numbers say the wrong thing.
8 questions7 min - Medium
Machine learning basics
Training, testing and the workflow behind a model that actually works.
8 questions8 min - Hard
Neural networks
Layers, weights and backpropagation, explained without the linear algebra.
8 questions8 min - Medium
Generative AI
Models that produce text, images and audio, and what that changes.
8 questions7 min - Medium
Prompt engineering
Getting useful output reliably, and knowing when the prompt is not the problem.
8 questions7 min - Easy
AI myths and facts
Sorting what these systems do from what headlines claim they do.
8 questions6 min - Medium
AI safety and ethics
Present harms, disputed long-term risks, and who is accountable.
8 questions7 min - Medium
Data visualization
Choosing a chart that answers the question and does not distort the answer.
8 questions7 min - Hard
Statistics for data science
Sampling, inference and experiments, aimed at people who will act on the answer.
8 questions8 min - Medium
Spot the misleading chart
The tricks that distort a chart without a single false number.
8 questions6 min - Medium
Correlation and causation
What it takes to move from things move together to one causes the other.
8 questions7 min - Medium
Data interpretation challenges
Reading tables and figures and drawing only the conclusions they support.
8 questions7 min