Math
Elementary math: arithmetic, shapes, fractions, and number sense
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1. What is 7 multiplied by 8?
2. What is the square root of 64?
3. How many sides does a hexagon have?
4. What is 15% of 200?
5. What is the value of pi rounded to two decimal places?
All 1,000 questions in this category are free to play.
Difficulty that adapts to you
Every question and every player carries an ELO rating, the same system chess uses. Answer correctly and you face harder questions; miss a few and the quiz eases off. That keeps practice in the productive zone - challenging enough to learn from, never so hard it stops being useful.
Each answer shows an instant explanation of what was right and wrong, so a quiz session doubles as a study session.