Predict the hidden card, reveal it, then prove the comparison using the first place-value difference.
- Read the current card. Choose Greater or Smaller to predict the next value.
- Reveal the next card. Compare from the greatest place and choose the first place that differs, or choose Number of digits.
- A correct proof on the first attempt earns one point. A correct prediction earns one bonus point. A hint, retry or revealed proof keeps the learning going but removes the proof point.
- Practice gives one calm, untimed eight-card row. A wrong prediction does not discard it.
- In Team mode, a correct prediction keeps the turn. A wrong prediction passes play and deals a fresh row. Every team receives three turns.
Teacher offers finite choices for the maximum value, card representations and comparison challenge. Hint aligns the values without marking the answer; Reveal proof marks and explains the deciding place.
In Teacher mode, Print Worksheet opens the teacher-account feature for making a paper card game from the current mathematical setup or another chosen stage.
