Numberphile revived an ancient multiplication trick—halves and doubles—also called Egyptian or Russian math, where you repeatedly halve one number and double the other. After crossing out rows with ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Gordon Scott has been an active investor and technical analyst or 20+ years. He is a Chartered Market Technician (CMT). Gordon Scott has been an active investor and technical analyst or 20+ years. He ...

Inbox management, like so much else, is a necessary evil in our day-to-day lives. As such, it’s best handled with the use of a strict system, but those can be tricky to implement and stick to. Also ...

Learn the 3 times table and its division facts with the resources below. You can take a quiz, practise mental arithmetic and learn a 3 times table song. Need to practise your 5 times table? Then look ...

Abstract: An improved variant of the precise-integration time-domain (PITD) method is proposed to eliminate the inverse matrix calculation and optimize the storage burden with the help of sparse ...

Abstract: We propose a novel source of high-power 1-3-THz radiation based on frequency multiplication in a planar gyrotron, with transverse energy extraction. In such a scheme, it is possible to ...