Sale ends in
-- H
-- M
-- S
Up to 27% off!

Cart Preview (0)

Your Cart is empty

Finite Sums of Positive Integers Pin

$2.75 $3.25
Size
Quantity

Pin FAQ

A Classic visual proof showing that the sum of the first n positive integers is n times n+1 divided by 2.

Classic pin-back button covered with scratch and UV-resistant mylar. Printed in the U.S.A.

Standard

FedEx 2-Day (4-6 Business Days)

Estimates include printing and processing time.More Shipping Info

We want you to love your order! If for any reason you don't, let us know and we’ll make things right.Learn More