Keep your mind sharp and your memory stronger.Ever stopped mid-sentence because your mind has wandered? Arrived upstairs to wonder why? Forgotten a PIN number you’ve had for ages?These ‘senior’ more...
Are you a genius? Could you qualify to join Mensa, the international society for high-IQ people? The only requirement for membership is to score in the top two per cent on a standard Mensa-supervised more...
Want to know how your brain measures up? You can go to a psychologist, pay lots of money, take a boring standardized test, and find out what you knew all along; that you are a genius, or you can have more...
Train your brain into working smarter, not harder.Sometimes an unsolvable problem requires a new way of thinking. It is a process and willingness to look at things in a different way. And this more...
Here are over 300 tantalizing puzzles, brain teasers and riddles by one of the greatest mathematical geniuses of the twentieth century, Shakuntala Devi, popularly known as the 'human computer'.The more...
Discover the adventure and excitement of mathematical puzzles! Match your wits with the human computer!! Sharpen your intellect, delight your friends and enjoy hours of purposeful more...
Measure your IQ — the index of intelligence used and accepted globally by the academic world, and the world of business and industry.The eight tests given in the book have been specially designed to more...
Join the world-renowned detective Sherlock Holmes and his investigating team in safeguarding London from the evil genius of notorious criminals led by Prof. Moriarity.Use your deductive powers to more...
