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 ...

Converting between fractions, decimals and percentages is a useful problem-solving skill. The data can be more easily ordered by size when written in the same format. Calculations often give a decimal ...

According to Pablo Vegas, CEO of the Electric Reliability Council of Texas, residents don't need to be alarmed: A new state law requires data centers to disconnect in phases at the grid operator’s ...

Getting good sleep is critical. A 2018 study found that people who sleep for five to six hours are 19 percent less productive than people who regularly sleep for seven to eight hours per night. People ...

Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, as well as household and digital decluttering, and oversees the freelancers on the sex and ...

Zaw Thiha Tun is currently an investment advisor for PI Financial Corp. He is also a financial writer on a wide variety of topics. LIFO is banned under IFRS due to potential financial distortions.

J.B. Maverick is an active trader, commodity futures broker, and stock market analyst 17+ years of experience, in addition to 10+ years of experience as a finance writer and book editor. Thomas J.