Math Mind

Shalinee Sharma is one of the world’s top experts on math learning, but when she was in school, she sat in the back row, unsure if she could ever master the subject. Many of us buy into the idea that some people are innately good at math and others just won’t ever succeed at it—but it’s not true, and numeracy is as important as literacy when it comes to opening doors in life.

We live in the age of the algorithm. Increasingly, the decisions that affect our lives—where we go to school, whether we get a loan, how much we pay for insurance—are being made not by humans, but by mathematical models. In theory, this should lead to greater fairness: everyone is judged according to the same rules and bias is eliminated. And yet, as Cathy O'Neil reveals in this urgent and necessary book, the opposite is true. The models being used today are opaque, unregulated and incontestable, even when they're wrong. Most troubling, they reinforce discrimination.

When Alex Stone was five years old, his father bought him a magic kit - a gift that would spark a lifelong love. Years later, while living in New York City, he discovered a vibrant underground magic scene exploding with creativity and innovation and populated by a fascinating cast of characters: from his gruff mentor, who holds court in the back of a rundown pizza shop, to one of the world's greatest card cheats, who also happens to be blind. Captivated, he plunged headlong into this mysterious world.

The best brain teasers are those that have challenged and captivated the attention of puzzle lovers throughout time. Collected here to keep your wits sharp, this book features the cleverest brain teasers from around the world and throughout history. The 125 Best Brain Teasers of All Time gives you hours of fun-filled entertainment with brain teasers that develop your problem-solving skills in math, logic, and wordplay. Organized as an integrated challenge, these brain teasers build in momentum as they increase in difficulty from classic nursery rhymes to the riddle of the sphinx.