Born and brought up in a sugar factory village, Pancharatnam turned into a good scholar in leading school and college in Pune; then IIT (Bombay). This propelled him into some of the world’s best universities–UC (Berkeley) and Stanford. He managed to get away from the ivory towers of USA and devote to more challenging and rewarding Indian chemical industry with more useful R&D and project engineering. Another success story was his own business of specialty filters for the mech. engineering industry, with over hundred reputed customers. So here he is – with a fully enjoyable career of fifty years with over fifty projects and many publications. Having spent all his life in technical investigation and improvements, he has brought to you vast variety of 500 interesting puzzles from various fields. Most are actually encountered in daily life. Many are truly unique and some quite advanced. Further, over 500 jokes are added for relaxing in between. So go ahead – struggle, laugh and learn a lot! This small book is highly recommended for students of final years of school, all college students in science/ engineering and tech. professionals. Even teachers will find it interesting for setting tests. Of course riddles and easy puzzles can be enjoyed by everyone. Free quarterly updates are assured on your email id for 1 year.

WORLD'S GREAT SCIENTIFIC PUZZLES BOOK: In this book, there are 150 unique puzzles and solutions of 16 different categories. Each puzzle is unique. These are nowhere to be found. All my own production, 150 puzzles with characters numbers, geometric, mathematical, logic and will delight readers of all ages. Puzzles in this book, all illustrated, all different figure, different size and with different levels of difficulty. Some are easy, some are hard some are very difficult. They are very entertaining and easy rules and easy to understand. My puzzles improve the following abilities of people, for example: -comparison -argumentation -focusing -Troubleshooting -Create a solution - motivate -independence -Scientific thinking and research, cause-effect relationship, etc. For people my puzzles is fun, very challenging, educational, scientific and protects against stress, keeps the brain young. İt is very helpful for all. I think Puzzle-Lover of all ages will love my puzzles very much. They are very entertaining. Have fun ! Author: Mehmet Esabil Yurdakul * * * Mehmet Esabil Yurdakul, born in 1956, Electrical engineer. He went to F. Germany in 1979. During his education he worked in various jobs. He returned to Turkey in 1984 and he began in 1985 to working in Turkey. 1991 he went official to Germany and worked there about 11 years. For about 20 years, he has been producing intelligence games / puzzles as a hobby. As an amateur together with his family, he published in 2007-2008 monthly puzzle magazine “Esobil Zeka Oyunları" Together with a group of foreign authors, he wrote a book titled, Spielzeit fürs Gehirn “playtime for the brain” published in German by Reader's Digest in 2014. Esobil Zeka Bulmacaları -I “Brain Puzzle Book-I” published by The Scientific and Technological Research Council of Turkey (TUBİTAK) in 2016. Esobil Zeka Bulmacaları - II “Brain Puzzle Book-II” published by The Scientific and Technological Research Council of Turkey (TUBİTAK) in 2018. He currently lives and works in Ankara/TURKEY

Help! A mad scientist has unleashed a throng of deadly robots on the world--and only by joining the characters and solving every one of these science-based puzzles can kids stop the destruction and save humanity. Learning about anatomy, astronomy, nature, secret codes, and more becomes a delightfully challenging game when these scientific subjects are woven into a thrilling and stylishly illustrated story. There's art throughout, created in a cool 1950's sci-fi style, and each puzzle focuses on a different topic. Through crosswords and riddles, word games and word searches, all kinds of fascinating facts emerge. Best of all, on the last page a "grand finale" uses all the solutions from other puzzles in the book.

'This is a marvellous book. The diversity of possible puzzles that can be given with these very limited resources, which are basically some paper and scissors, is overwhelming, and the challenges are sometimes very tough. Even the two-star problems may be hard for an untrained puzzler. This is medicine against boredom on long rainy days, but be careful not to get addicted or it may suck up your less empty and sunny days as well.' See Full ReviewEuropean Mathematical Society ALL YOU NEED IS PAPER! All the puzzles inside are made out of paper — from simple teasers to extreme brain workouts!ORIGINAL DESIGNS Co-developed by a mathematician, an origami artist and a mechanical puzzle maker, this inventive book provides a unique and invaluable collection of a large, comprehensive and diverse variety of paper puzzles. And they only require a sheet of paper and perhaps a pair of scissors!EASY TO CHALLENGING There are 99 unique puzzles including paper strip puzzles, Möbius strips and flexagons, two-dimensional sheet folding, 'fold-and-cut' puzzles, 3D dissections and constructions, sequence folding puzzles, origami puzzles and even paper toys and magic. PROVIDES HOURS OF FUN Anyone of any age can find hours of enjoyment and challenge!LEARNING GEOMETRY, MATHEMATICS AND PROBLEM-SOLVING CHALLENGES CAN BE FUN! For students and teachers; parents and children; amateur and skilled mathematicians, and puzzle lovers.LEARN CONCEPTS AS YOU GO! Many of the puzzles are new and original, they complement the classic puzzles that are included and all of them come with a solution as well as a mathematical and geometrical explanation that can be easily understood by all. The layout of the book, with its extensive puzzles, solutions and detailed descriptions, make it a sure candidate as the paper puzzle 'bible' for enthusiasts and puzzle lovers everywhere.

Help! A mad scientist has unleashed a throng of deadly robots on the world--and only by joining the characters and solving every one of these science-based puzzles can kids stop the destruction and save humanity. Learning about anatomy, astronomy, nature, secret codes, and more becomes a delightfully challenging game when these scientific subjects are woven into a thrilling and stylishly illustrated story. There's art throughout, created in a cool 1950's sci-fi style, and each puzzle focuses on a different topic. Through crosswords and riddles, word games and word searches, all kinds of fascinating facts emerge. Best of all, on the last page a "grand finale" uses all the solutions from other puzzles in the book.

"Of immense interest to those who enjoy recreational maths and puzzles . . . even the most hardened puzzler will find something new." -- Mathematical Gazette Puzzles are as old as history itself, following an arc like that of technology: centuries of slow progress, followed by rapid expansion in the 1800s, and an explosion of activity in the twentieth century. This collection by bestselling author David Wells, a Cambridge math scholar and teacher, follows that pattern. Its first part is devoted to puzzles from ancient Egypt and Babylon and subsequent sources, featuring those devised by Lewis Carroll, Eduard Lucas, Sam Loyd, and other master puzzlers of the Victorian era. The second part demonstrates the tremendous variety of twentieth-century puzzles. More than 560 puzzles are included, from the "mind sharpeners" of a medieval monk to the eighteenth-century Ladies' Diary, the Hindu Bhakshali manuscript, and riddles and popular rhymes. None requires any mathematics beyond the most elementary algebra and geometry -- and few require even that. Complete answers appear at the end.

For the upper elementary and middle school teacher, this unique resource offers 150 science puzzle activities ranging from word scrambles, word searches and categorizing, to variations on crosswords and min-problems solvers to help you add challenge and humor to instruction while keeping lessons moving at a steady pace.