The Mathworks Math Contest asks middle-schoolers to do what a classroom rarely asks: not merely to get the answer, but to show how they got there, in writing, to someone who will read it. In 2025 it drew 962 students from the United States and abroad. The average score was 2.72 out of 15. Fourteen of those 962 scored twelve or better.

This book teaches that.

375 problems written for the training camp at ACES Learning Center in Austin, Texas, in four parts and twenty-four topic chapters — rates and work, angle chasing, lattice paths, invariants, cryptarithms, modular arithmetic and the rest. Every one is worked through from scratch.

Every problem gets three things

A solution that explains itself — not just the steps, but why you would think of them, and what you would have tried first.
A sample written solution, set in handwriting: the short, labeled write-up that actually belongs on an answer sheet, with the answer boxed. Not a paragraph of prose, and not a page of scribble with a number circled at the bottom. This is the part almost no student is taught.
A second look, wherever one exists — the shorter route, the cleverer route, or the one that explains why the first route worked.

The companion sets are the heart of it

Forty-seven times in this book, a problem is followed by two or three more that use the same method, and then a short box headed Taking stock. A method you have seen once is a trick. A method you have seen three times, in three configurations, with one case where it nearly fails, is a tool you own. The last problem in each set bends the method until you can see its edge — the configuration where the obvious version gives a clean, confident, wrong answer.

Built as a course, not an answer key

Each chapter opens with the skills that unlock it, stated as tools with their actual formulas rather than as topic headings, and closes by naming its hardest problems and the one idea that cracks each.

Where the problems come from

The companion problems were written from scratch for this book. The core problems are adaptations: each began as a problem from the published record of middle-school competition mathematics, including past MMC and PMWC papers, and was rewritten here with a new setting, new names, a redrawn figure and, nearly always, different numbers. Nothing is reproduced word for word, and no contest answer key was used. Every solution was worked out from scratch by the ACES coaching staff — coaches of national-champion MATHCOUNTS teams — and checked line by line.

A companion Workbook contains all 375 problems with room to work and nothing else.

For students in grades 6–8, for coaches who want a year of ready material, and for parents looking for something harder than the textbook and kinder than a wall of answers.

Not affiliated with, endorsed by, or sponsored by Texas State University Mathworks or Po Leung Kuk.

“Sinopsis” puede pertenecer a otra edición de este título.

preigu

Osnabrück, Alemania

Vendedor de 5 estrellas

Vendedor de IberLibro desde 5 de agosto de 2024

Tarifas de envío de Alemania a Estados Unidos de America

Artículo	De 60 a 60 días hábiles	De 60 a 60 días hábiles
Primer artículo	EUR 70,00	EUR 70,00

Los plazos de entrega los establecen los vendedores y varían según el transportista y la ubicación. Los pedidos que pasan por la aduana pueden sufrir retrasos y los compradores son responsables de los aranceles o tarifas asociadas. Los vendedores pueden ponerse en contacto con usted en relación con cargos adicionales para cubrir cualquier aumento en los costes de envío de los artículos.

Métodos de pago

PayPal

Descripción de la tienda

preigu betreibt einen Onlineversandhandel mit über 1 Mio. Produkten in verschiedenen Sortimenten. Das Kernsortiment besteht aus Büchern, Medien und Spielwaren. Ein gelungenes Einkaufserlebnis ist das Ziel einer jeden Bestellung bei preigu, denn der Kunde und seine Zufriedenheit stehen an erster Stelle. preigu setzt daher auf einen kompetenten Kundenservice, funktionierende Prozesse und schnelle Reaktion.

Especialidad

Bücher, Spielwaren

Información empresarial del vendedor

preigu GmbH & Co. KG

Lengericher Landstraße 19
Osnabrück, Alemania 49078

Contactar con el vendedorVer los artículos de este vendedorVer la página principal del vendedor

Condiciones de venta

About Us

Legal website operator identification:

preigu GmbH & Co. KG
Lengericher Landstr. 19
49078 Osnabrück
Germany

Telephone: +49 (0) 541 / 580 72 84
Email: mail@preigu.de

VAT No: DE 455 380 498
AG Osnabrück - HRA 209647

PhG: preigu Verwaltung GmbH
AG Osnabrück - HRB 221793
CEO: Ansas Meyer

We are neither willing nor obliged to participate in dispute resolution proceedings before consumer arbitration boards.

We are a member of the initiative "FairCommerce" since 30.11.2016.
For more information, see: https://www.haendlerbund.de/de/haendlerbund/interessenvertretung/faircommerce

Derecho al desistimiento

Instructions for revocation

Right of withdrawal for the sale of goods

Revocation right for consumers
(A ‘consumer' is any natural person who concludes a legal transaction which, to an overwhelming extent, cannot be attributed to either his commercial or independent professional activities.)

Instructions for revocation

Revocation right
You have the right to revoke this contract within 14 days without specifying any reasons.
The revocation period is 14 days with effect from the day,

on which you or a third party nominated by you, which is not the carrier, had taken possession of the products, provided you had ordered one or more products within the scope of a standard order and this/these product/products is/are delivered uniformly;
on which you or a third party nominated by you, which is not the carrier, had taken possession of the last product, provided you had ordered several products within the scope of a standard order and these products are delivered separately;
on which you or a third party nominated by you, which is not the carrier, had taken possession of the last part delivery or the last unit, provided you had ordered a product, which is delivered in several part deliveries or units;

To exercise your right of withdrawal, you must inform us (preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, Telephone number: +49 (0) 541 / 580 72 84, E-Mail address: mail@preigu.de) by means of a clear declaration (e.g. a letter sent by post, or an e-mail) of your decision to withdraw from this contract. You can use the attached model withdrawal form for this purpose, which is, however, not mandatory.

You can also exercise your right of withdrawal online by clicking on a button labelled accordingly (such as ‘Withdraw from contract' or similar) on the AbeBooks/ZVAB website. If you use this online function, you will immediately receive a confirmation of receipt on a durable medium (e.g. via email) containing information on the content of the withdrawal notice, as well as the date and time of its receipt.

In order to safeguard the revocation period, it is sufficient that you send the notification about the exercise of the revocation right before the expiry of the revocation period.

Consequences of the revocation

If you revoke this contract, we shall repay all the payments, which we received from you, including the delivery costs (with the exception of additional costs, which arise from that fact that you selected a form of delivery other than the most reasonable standard delivery offered by us), immediately and at the latest within 14 days from the day on which we received the notification about the revocation of this contract from you. We use the same means of payment, which you had originally used during the original transaction, for this repayment unless expressly agreed otherwise with you; you will not be charged any fees owing to this repayment.

We can refuse the repayment until the products are returned to us or until you have furnished evidence that you have sent the products back to us, depending on whichever is earlier.

You must return or transfer the products to us immediately and, in any case, at the latest within 14 days with effect from the day on which you inform us of the revocation of this contract. The deadline is maintained if you send the products before the expiry of the 14 day deadline.

You bear the direct costs for returning the products.

You must pay for any depreciation of the products only if this depreciation can be attributed to any handling with you that was not necessary for checking the condition, features and functionality of the products.

Criteria for exclusion or expiry

The revocation right is not available for contracts

for delivery of products, which are not prefabricated and for whose manufacturing an individual selection or stipulation by the consumer is important or which are clearly tailored to the personal requirements of the consumer;
for delivery of products, which can spoil quickly or whose use-by date would be exceeded quickly;
for delivery of alcoholic drinks, whose price was agreed at the time of concluding the contract, which however can be delivered 30 days after the conclusion of the contract at the earliest and whose current value depends on the fluctuations in the market, on which the entrepreneur has no influence;
for delivery of newspapers, periodicals or magazines with the exception of subscription contracts. The revocation right expires prematurely in case of contracts
for delivery of sealed products, which are not suitable for return for reasons of health protection or hygiene if their seal has been removed after the delivery;
for delivery of products if they have been mixed inseparably with other goods after the delivery, owing to their condition;
for delivery of sound or video recording or computer software in a sealed package if the seal has been removed after the delivery.

Specimen - revocation form

(If you wish to revoke the contract, please fill up this form and send it back to us.)

To preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, Email address: mail@preigu.de :
I/we () herewith revoke the contract concluded by me/ us () regarding the purchase of the following products ()/
the provision of the following service ()
Ordered on ()/ received on ()
Name of the consumer(s)
Address of the consumer(s)
Signature of the consumer(s) (only in case of a notification on paper)
Date

(*) Cross out the incorrect option.

Crack Math Challenges

Descripción del artículo del vendedor

Detalles bibliográficos

Sinopsis

Fifteen problems. Two hours. No multiple choice.