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TOPICS
Explanations
What the colors mean
Red color
The chart marks questions answered incorrectly the last time they were attempted.
Yellow color
The chart marks questions answered correctly only once.
Green color
Learned questions, meaning questions answered correctly twice in a row. If you answer a learned question incorrectly in the main test, it becomes unlearned again and must be answered correctly twice to become learned again.
What the buttons mean
Learn
Button: it shows only questions you have not reviewed yet or have not learned yet. After answering, you immediately see the correct answers, the explanation, and the KET rule reference.
Take test
Button: a test with 20 questions selected from a specific topic.