Jane Chen Books

Twenty Problem Solving Skills
Twenty Problem Solving Skills

By Jane Chen

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American mathematics competitions AMC 8 preparation
American mathematics competitions AMC 8 preparation

By Yongcheng Chen

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This book can be used by 5th to 8th grade students preparing for AMC 8. Each chapter consists of (1) basic skill and knowledge section with plenty of examples, (2) about 30 exercise problems, and (...

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Twenty More Problem Solving Skills For Mathcounts Competitions
Twenty More Problem Solving Skills For Mathcounts Competitions

By Jane Chen

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Your book is “fabulous”. I spent two hours last night working problems from it. I'm planning to use some in what I do with teachers, with citation of course. I love it. I love the clever problems y...

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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.

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