Welcome to The Riddler. Every week, I offer up problems related to the things we hold dear around here: math, logic and probability. There are two types: Riddler Express for those of you who want ...

Forbes contributors publish independent expert analyses and insights. Barry Collins is a tech journalist writing about PCs, Macs and games. We’ve all been in shades of lockdown for months, it’s the ...

If your circles always end up looking like a deformed eggplant and you don't have a compass nearby, here's a simple trick to drawing a perfect circle with just a pencil and your finger. Whether you're ...

Let's face it: drawing circles is hard. Our minds are programmed to love the symmetry of the shape, but our hands just can't make it perfect. We're so inadequate at drawing circles, scientists have ...

October 22, 2014 Add as a preferred source on Google Add as a preferred source on Google Most speed squares have a notch at the 90 degree corner which is used to determine angles. To draw a circle ...