







Charles Hewitt asked Quandaries and Queries for an algorithm to determine whether a number is prime. Penny wrote this response about the Greek scholar Eratosthenes and his sieve.

AUTHOR(S): Penny Nom




An approach to teaching permutations and combinations that leads to the Binomial Theorem.

AUTHOR(S): Penny Nom




This is a game that should be accessible to students who can perform mental, two digit arithmetic. The explanation of why it works involves base two arithmetic.

AUTHOR(S): Penny Nom
