Practice · Praxis

0/0 this session +0 XP

Multiple choice Easy index-laws ~30s

Simplify: x⁵ · x³

A x² B x⁸ C 2x⁸ D x¹⁵

Hints are free to take and they are counted. A correct answer after two hints moves your mastery less than one without — which is the honest way to score it.

Why this question? this skill is new to you; the difficulty is about right — roughly 80% chance you get it; and it needs calibrating — few people have tried it Predicted chance you get it: 80% — the selector aims at 78%.

difficulty fit 0.986

skill need 0.75

review boost 0

calibration bonus 0.12

recency penalty 0

repetition penalty 0

frustration 0