This clever self-working card trick relies on simple math rather than sleight of hand, yet the result feels genuinely impossible. Even after shuffling, the numbers always line up perfectly at the end.

When I was in middle school, I had a classmate who would look at trigonometric functions and yell, "I will never need these!" ...

A simple construction tip rooted in high school math that helps improve accuracy and efficiency on building projects. Sometimes the basics really do matter. Have you used math like this before?