Jack Goldstein 
101 Amazing Brainteasers [PDF ebook] 
Riddles and Puzzles for All Ages

Contained within this book are over one hundred fun brainteasers for children and adults alike. Covering subjects including numbers, words, logic problems and lateral thinking they are sure to have you scratching your head — until you reveal the answers (at which point you’ll say you knew it all along!)These brainteasers are separated into sections for easy navigation and will test every area of your brain whether you are old or young. Full answers and solutions are provided.