The "trick", which is taught in Japanese schools, involves drawing parallel lines to represent the digits you are multiplying together (e.g. vertically), with the second set of digits intercepting ...

Did you enjoy your dining service? Leave your server a 20 percent tip with this easy math trick. According to Kate Snow, ...

You'll need to be a proper clever clogs to solve this fiendish puzzle. While many brainteasers rely on having laser-sharp vision, the general knowledge of a quiz master, or the literary skills of ...

Practise Rachel's method for finding percentages and you'll know if you've got a real bargain on your hands in no time. Check out another double-digit multiplication trick with Rachel's maths hack ...