Can you solve this simple looking equation in 30 seconds by remembering the math class rule

See if you can recall math lessons from school to get to the bottom of this sum that has left people confused.
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Fashion's 20-year rule is now backed up by math

Mathematicians say they've confirmed an age-old rule of fashion: that trendy women's styles get recycled every 20 years or so. For the study out of Northwestern University, researchers pulled together ...
IEEE

A Deep Learning-Based Approach for Two-Phase Flow Pattern Classification Using Void Fraction Time Series Analysis

Abstract: Flow regime classification is essential for analyzing and modeling two-phase flows, as it demarcates the flow behavior and influences the selection of appropriate predictive models. Machine ...
Scientific American

The curious math that explains why fashion trends always come back around

Fashion followers know that trends tend to reappear on a 20-year cycle, and a new analysis of more than 150 years’ worth of ...

Bell-bottoms today, miniskirts tomorrow: Math reveals fashion's 20-year cycle

Fashion insiders and beauty magazines have long cited the "20-year-rule"—the idea that clothing trends often resurface every two decades. According to Northwestern University scientists, that ...
IEEE

Scenarios to Handle Shifts Data Pattern Using Neural Network for Forecasting Indonesian GDP Based on Financial Growth at Risk

Abstract: Modeling time series data through statistical techniques is a common practice in economics, primarily aimed at forecasting economic indicators such as GDP to prepare for future trends. Over ...