Page:Mathematical Recreations or, a Collection of many Problems Extracted out of the Ancient and Modern Philosophers (Jean Leurechon, 1674, b30325882).pdf/47

1



Id him that he Quadruple the Number throught upon, that is, multiply it by 4, and unto it bid him to add 6, 8, 10, or any Number at pleaure: and let him take the half of the um, then ask how much it cocmes to? for then if you take away half the number from it which you willed him at firt to add to it, there hall remain the double of the number thought upon.  Rh