Terms

What this is

A free study site run by one person. It costs nothing, it has no premium tier, and it carries no advertising. Use it for as long as it is useful to you.

It is not affiliated with Math Kangaroo

Independent project. Not affiliated with or endorsed by Math Kangaroo in USA, NFP.

“Math Kangaroo” is a trademark of Math Kangaroo in USA, NFP. It is used on this site descriptively, to say what the material prepares students for. No official problem, figure or answer is reproduced anywhere here; the paper index holds our own analysis and links out to the official PDFs.

What you may do with the material

Print it, hand it out, translate it, build on it — for teaching, for a club, for your own children. The problems and explanations are CC BY-NC-SA 4.0, which asks three things: credit the source, do not sell it, and share what you build under the same terms. The code is MIT. See the licence page.

What you may not do

• Sell the content, or put it behind a paywall.
• Present it as official Math Kangaroo material, or as endorsed by them.
• Use it to harass anyone, or attempt to reach another person’s account data.

No guarantees

Problems are written and reviewed by people, and people make mistakes. If an answer here is wrong, please report it from the problem’s own page — every problem has a link that opens a public issue. Nothing on this site is a promise about how anyone will score on a real exam.

Availability

This runs on free hosting and could go down, change, or move. If it ever disappears, the whole thing — every problem, every explanation — stays available in the public repository, which is deliberate.

Privacy

Covered separately and in plain language on the privacy page.