Ämne
Lektioner i Matematik
Explore free interactive mathematics lessons covering arithmetic, algebra, geometry, statistics, and more. Each lesson features hands-on questions and instant feedback to help students build confidence and mastery at their own pace.
Mest populära
Veckans lektion i matematik
Grandpa Never Loses — How to always win the 21 matchstick game (Nim)
The matchstick game — 21 matches on the table, take one, two or three, and whoever picks up the last match wins — is not luck at all: it is completely solved, and this lesson shows you how to work the winning rule out yourself. You start where the game ENDS, at zero matches, and count backwards until you find the trap numbers: 4, 8, 12, 16, 20. Then you find out the thing that took a kid eleven summers to notice — why Grandpa always went first.
Grandpa Never Loses — How to always win the 21 matchstick game (Nim)
22 frågor · 15 min
The Short Order — Why does serving the quickest first make everyone wait less?
26 frågor · 15 min
Visar 2 av 2
Vanliga frågor
What math topics are available on Viafocus?
Viafocus offers lessons spanning arithmetic, fractions, algebra, geometry, statistics, probability, and calculus fundamentals. New lessons are added regularly by educators worldwide.
Are the math lessons free?
Yes. All interactive math lessons on Viafocus are free to access. Simply browse, pick a lesson, and start learning — no account required.
What grade levels do the math lessons cover?
Our math lessons range from elementary (grades K-5) through high school (grades 9-12) and university level. Each lesson indicates its difficulty and recommended grade range.