Imaginary numbers can seem confusing at first, but they play a powerful role in mathematics and real-world applications. This guide explains what imaginary numbers are, why they exist, and how they ...

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 ...

19 is only 1 away from 20, so you prefer to start by multiplying 20 times 5, which equals 100. Then we need to take away a squadron of 5, because there are actually only 19 squadrons, not 20. 100 take ...

From “Ayo Edebiri” to “this is fine,” puzzles reveal a portrait of the people who make and solve them.

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. A Social Security number (SSN) is a numerical ID for U.S. citizens and residents to track ...

An animated guide in which fractions multiply to make baby fractions and a rather violent fraction divides numbers with a chainsaw. Use to illustrate the processes of multiplying fractions, and ...

The Powerball jackpot for Monday’s drawing is $33 million - less than a week after someone won $1.8 billion on Christmas Eve. *Based on iOS download data collected by Sensor Tower. Jackpocket is the ...

Were you a lucky winner? Check your tickets for lottery draw games in Nebraska here. 1:59 a.m. ET Jan. 7 *Based on iOS download data collected by Sensor Tower. Jackpocket is the official digital ...

The U.S. Department of Interior’s new fee structure for international visitors has officially gone into effect, imposing a $100 per person surcharge on foreign travelers visiting 11 of the nation’s ...

Democracy is in retreat or at least on the defensive almost everywhere, while wars are getting bigger and more frequent. The ...

After years of Sunday night dread and "just until" promises, I discovered the warning signs that separate those who'll retire ...