It looks like a simple math sum but has left people scratching their heads... can you solve it?

It looks simple at first, but this math problem has the internet stumped. Don't be fooled - it demands more brainpower than ...
Tech Xplore

Unique resin allows 3D-printing method to add and subtract

Additive manufacturing, or 3D printing, is normally a one-way street. In a digital light processing (DLP) printer, a ...