So That's Why 22⁄7 Is Used for Pi!
How students using graph calculators can explore rational number approximations to irrational numbers.
Elementary Graphics and Animation with Your Calculator
A discovery activity that connects mathematics and the world of entertainment. The activity combines geometric transformations with a calculator's DRAW, MATRIX, and PRGM features to generate visual reinforcement of mathematical concepts.
An Odd Sum
Ray Shiflett, Harris Shultz
The authors characterize those numbers that are the sum of consecutive of natural numbers and count how many such representations a given number has.
Randomness, Statistics, and Pi
Employing statistical tools to determine whether the digits of Pi are pseudorandom. The difficulties in answering this question are also discussed.