Learn English – the difference between “Rest of the things” and “Remaining things”

meaningword-choice

In which context these words find their use? are they synonym to each other?

Rest of the things is used when we do not know the quantity of things.

On the other hand, Remaining is used when the quantity of things is known to us.

Let's clear it up with a couple of examples.

Lets assume that in case one I do not know how many pages a book contain.

1) I've read twenty pages today, I'll read the rest of the pages tomorrow.

And in case two we know that a book contains fifty pages.

2) I've read twenty pages today, I'll read the remaining thirty pages tomorrow.

Above was just an example, you can substitute the pages with whatever you wish.