Genius math tricks

Yeah what a genius trick for that cube root. The cube root of 64 must be 6+4-3=7. 🤓

Finally, a way to look like a human calculator without the smoke coming out of my ears.

The "calculation" to find a cube root will not work for any other number. It is a numerical coincidence. It will give the same answer for 512, but the cube root of 512 is 8, not 5.

Isn’t it more useful to actually learn the math instead of memorizing a bunch of tricks?