Is binary or hexadecimal better than decimal system Human have been evolved to use decimal. But I have two views that say that either decimal or hexadecimal would be better > 1. Hexadecimal would be better as it would take less digits in hexadecimal than in decimal. > 2. Binary would be better as it is simple and less complex. > If we started calculating in hexadecimal or decimal would it save save time? Which one of these is correct or are they both wrong. Thanks

They're all excellent for their own uses. There is no number system which is objectively "better" than any other.

When working directly with computers and low-level programming, number systems based on powers of $2$ are easier to use because they translate easier to bits of $0$ and $1$.

If you want to talk about numbers to members of the general public, you should use base ten, because otherwise you run a great risk of not being understood properly.

If you're looking at a watch, you should think in base $60$, you never think that $10.31$ hours have passed since midnight; you think that the time is $10:18:36$.

The time and space you save by being "more efficient" isn't worth the confusion you cause by picking the wrong system for the situation.