Slides for class

Slides ready to project: each problem is posed on one slide and solved on the next, with animations and teacher notes. They open in the browser, with nothing to download or install.

In the slides: arrow keys or click to move on, F full screen, N teacher notes.

For teachers only

The slides open with a teacher account. Signing up is free and also gives you groups, competitions and tracking of your students in the labs.

Sign up as a teacher I already have an account

Combinatorics

Volume IV · Balls, boxes and teams For teachers only

Combinatorics Almanac

Volume IV · Balls, boxes and teams

Ages 15–16 Ages 16–18

Fifteen problems for the advanced reader: Marta’s staircase, teams without colours, Magda’s dolls, the hockey stick, dominoes, balls and dividers, Anita’s necklace, the urn with nine balls and the absent-minded secretary. Each problem is posed on one slide and solved on the next.

36 slides · 5 animations

Sign up as a teacher