← LESSONS 0/8 CALIBRATED

Guess first.
Then the math.

Every lesson here asks for a number before it shows you the real one. Not a quiz — a calibration: the gap between your guess and the math is the thing worth knowing about yourself.

Land within 25% and the lesson counts as calibrated. Guess again any time.

THIS MONTH — here until the calendar turns

THE PERMANENT EIGHT

CALIBRATED

All eight, within a quarter.

Your gut and the arithmetic now disagree politely — and you know by exactly how much. Average miss across the eight: 0%.

◈ 8 REP paid — the same currency the arcade mints.

take it to a paper book →