Mental Math

Will you pay more for a $19.99 shirt with a 20% discount or a $24.99 shirt with a 30% discount? Can you quickly calculate how many eggs you’ll need to make 100 pancakes if your recipe says that 2 eggs make 20 pancakes? Can you work out how much a $30-per-month gym membership will cost over 24...

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.

Would you like to double your reading speed without losing comprehension? Can you work out how much a $30-per-month gym membership will cost over 24 months without writing anything down or using a calculator? Do you want to improve your focus, memory, and productivity while training your brain?...

Conquer math anxiety and elevate cognitive skills with proven calculation strategies for daily problem-solving. Whether you are budgeting at the grocery store or splitting a dinner bill, this calming, productive audio guide turns intimidating numbers into manageable tools. Transform your daily...

Bust the math myths that are holding you and your kids back and learn the importance of numeracy with this one-of-a-kind resource for parents, educators, and policymakers 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...

Beat math anxiety and build playful confidence with this interactive children's audiobook on smart, real-world guessing. Perfect for the morning school run or a family road trip, this upbeat and humorous guide proves that you don't always need the exact answer to be right. Interactive...

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.

A father and husband's meditation on love, adolescence, and the mysterious mechanisms of poetic creation, from the acclaimed poet. The poet's art is revealed in stages in this "making-of" book, where we watch as poems take shape--first as dreams or memories, then as drafts, and finally as...