Count On

Explorer:

• 
  
  • Maths and Magic
  • Patterns
  • Randomiser
  • Number
  • Primes, Factors and Divisibility
  • The Fabulous Fractal Factory
• 
  
  • The Wise Wizz of Woo
  • Diversions
  • Origami
  • Puzzle of the Day
  • Fractions
  • Online Stories

Puzzle of the Day

These puzzles are also printed in Eight days a week, a booklet published by the Association of Teachers of Mathematics.

If you have sticks which measure 1, 2, 3, 4, 5, 6, 7, 8 and 9 cm (one of each) how many different triangles could you make using three of the sticks?

Answer: 34