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The Viafocus library

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Puzzles and mysteries

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Riddles and cases to crack with maths

Intermediate
MathematicsGrades 4, 5, 6, 7, 8, 9

Kluringar: vilka mattegåtor lurar nästan alla?

19 questions · 8 min

VViafocusOfficial Viafocus lesson
Beginner
MathematicsGrades 3, 4, 5, 6

Mysteriet med kakburken: vem tog kakorna? Lös fallet med räkning och bråk

20 questions · 10 min

VViafocusOfficial Viafocus lesson
Intermediate
MathematicsGrades 5, 6, 7

Mysteriet på tågstationen: hur löser man ett fall med klockan och tidtabeller?

26 questions · 15 min

VViafocusOfficial Viafocus lesson

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Interactive lessons for every classroom

Every lesson on Viafocus is interactive: students answer as they go and get immediate feedback, while teachers see live results. Lessons are created by teachers across Sweden and by the Viafocus studio — official lessons carry a blue verified mark.

Start with Mathematics · Science · Official Viafocus

Frequently asked

Are Viafocus lessons free?

Yes — every lesson in the library is free to play in the browser, with no account required. A free account lets you save lessons and see results.

Can I run a lesson live with my class?

Yes. Start a live session from any lesson — students join with a code on their own devices, and their answers land on your dashboard in real time.

Who creates the lessons?

Teachers in the community and the Viafocus studio team. Lessons built by the Viafocus studio carry a blue verified mark next to the byline.

Can I use a lesson someone else made?

Yes. Any published lesson can be played, shared with a class, or copied into your own library so you can adapt it before teaching it.