## Sanford Society

The purpose of this club is to provide opportunities for students majoring in or interested in the fields offered by the Department of Mathematics, Computer Science, and Statistics. This club shall provide a fun environment, complete with opportunities for students to network with peers, faculty, and field experts.

## CPU - Computer Programmers United

We are a forum for students and faculty to share ideas, concepts, technology, information, and insights related to the field of computer science. While we accept a wide range of topics and discussions, we value the quality of meetings over the number of members.

## Interesting Problem Workshop

The Interesting Problem Workshop is an informal gathering of faculty and students to discuss problems of interest in mathematics and related areas of all levels of challenge.

In Spring 2017 we are meeting in Fitzelle 207 on Fridays at 3:30 p.m. (or at 4 p.m. on weeks when there is a Department Seminar).

Some interesting problems:

- Find a 10 digit number such that the leftmost digit is the number of zeros appearing in the number, the next digit is the number of ones, the next is the number of twos, and so on, up to the rightmost digit, which is the number of nines appearing in the number.
- Let NN be one more than the product of four consecutive positive integers. What can you say about NN and why? (From: A Friendly Mathematics Competition, P1983-7)
- Find all pairs of positive integers (a,b) such that a−b is prime and ab is a perfect square. (From the Purdue University problem of the week.)
- Prove that if you pick any n+1 numbers between 1 and 2n inclusive, then one of those numbers will be a multiple of some other one.