Andy Liu Books

Hungarian Problem Book III
Hungarian Problem Book III

By Andy Liu

Average: 0.00, 0 Ratings

Read More
Arithmetical Wonderland
Arithmetical Wonderland

By Andy Liu

Average: 0.00, 0 Ratings

Read More
Problems from Murray Klamkin
Problems from Murray Klamkin

By

Average: 0.00, 0 Ratings

"Murray Klamkin was a dedicated problem solver and problem proposer, who left indelible marks on the problemist community. After working in industry and academe in the United States, he spent the l...

Read More
S.M.A.R.T. Circle Overview
S.M.A.R.T. Circle Overview

By Andy Liu

Average: 0.00, 0 Ratings

Read More

Related Articles from our Blog

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

Read More