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Description
One Hundred Problems in Elementary MathematicsBoth a challenge to mathematically inclined readers and a useful supplementary text for high school and college courses, One Hundred Problems in Elementary Mathematics presents an instructive, stimulating collection of problems. Many problems address such matters as numbers, equations, inequalities, points, polygons, circles, ellipses, space, polyhedra, and spheres. An equal number deal with more amusing or more practical subjects, such as a picnic
Both a challenge to mathematically inclined readers and a useful supplementary text for high school and college courses, One Hundred Problems in Elementary Mathematics presents an instructive, stimulating collection of problems. Many problems address such matters as numbers, equations, inequalities, points, polygons, circles, ellipses, space, polyhedra, and spheres. An equal number deal with more amusing or more practical subjects, such as a picnic ham, blood groups, rooks on a chessboard, and the doings of the ingenious Dr. Abracadabrus.Are the problems in this book really elementary? Perhaps not in the lay reader's sense, for anyone who desires to solve these problems must know a fair amount of mathematics, up to calculus. Nevertheless, Professor Steinhaus has given complete, detailed solutions to every one of his 100 problems, and anyone who works through the solutions will painlessly learn an astonishing amount of mathematics. A final chapter provides a true test for the most proficient readers: 13 additional unsolved problems, including some for which the author himself does not know the solutions.
Binding Type: Paperback
Publisher: Dover Publications
Published: 05/18/2016
ISBN: 9780486238753
Pages: 192
Weight: 0.44lbs
Size: 8.43h x 5.38w x 0.41d
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4.0 ★★★★★
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★★★★★ 2
Beware of the off-gassing smell.
As much as I like the durable case, the ONLY complaint I have is the off-gassing. The case works great and I have no problems with it. But the smell is something terrible. My entire travel case smells horrible after coming back from a client just because this case has been transported within it. I had my coat on top of it one day and then my coat stunk. I thought if I aired it outside for a bit it would clear it up. When I take it back inside and use it again, it continues to smell. It is so offensive that I am ordering something from another company. I CANNOT say it smells similar to cigarette smoke, but can say that it smells like it has been in a smoker's home for the last 30 years and you just can't get the smell out, no matter what I do. And I tried to spray it with fresheners etc. Nothing worked. I can't use it because of this. I rated as a 2 only because of the smell. As mentioned earlier, the case itself is perfect and performs as it should.
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Reviewed in the United States on April 21, 2026
★★★★★ 5
Sturdy case large enough for most keyboards, with space for a mouse.
This is a great case that will protect most keyboards very well. My keyboard and mouse set is from Jelly Comb, and they fit well. It’s very spacious inside. In fact, my keyboard is thinner than what this case is designed for, so I had to pad the keyboard so it won’t move around too much, but I don’t consider this a bad thing. Now I know that if I get a larger keyboard, I can still use the same case. I also like the way it’s designed for a mouse. There are two pouches on top that indent into the case, so you can easily fit a mouse or cables in there and they won’t protrude too much. This case is perfect, and I can’t recommend it enough.
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Reviewed in the United States on May 16, 2024
★★★★★ 5
Nice case for carrying keyboards
The case is perfect for carrying keyboards or other items. I am using it for an apple keyboard and trackpad.
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Reviewed in the United States on June 2, 2024
★★★★★ 5
Excellent Black Shelf Brackets for Sturdy Shelves!
Style: Black 8 Pack, Size: 7.25 inch
I recently purchased these black shelf brackets for my home office, and they have been a game-changer! The quality is outstanding, and they provided the sturdiness I needed for my shelves. I was able to create beautiful shelves effortlessly by pairing these brackets with 8" wide pine boards.
These brackets are incredibly well-made and durable. They held the weight of my books, files, and office supplies with ease, without any signs of bending or sagging. I feel confident that my items are secure and won't come crashing down.
Installation was a breeze. The brackets came with all the necessary hardware, and the instructions were clear and straightforward. Within minutes, I had my shelves up and ready to use.
This is my second pack of these brackets, and I couldn't be happier with my purchase. They are versatile, allowing me to create customized shelves that perfectly match my office decor. The sleek black finish adds a touch of elegance to the overall look.
If you're looking for high-quality and sturdy shelf brackets, I highly recommend these. They have exceeded my expectations, and I am delighted with the results. Don't hesitate to give them a try for your shelving projects!
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Reviewed in the United States on June 1, 2023
★★★★★ 5
Good deal and good quality!
Style: Black 10 Pack, Size: 9.25 inch
Sturdy and as advertised. Just like you’d get at big box store but much better price!
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Reviewed in the United States on May 16, 2026