What does “divisible by” mean? I know it sounds a stupid question, but what does this term exactly mean.

Dear Student,

Its good that you are clearing this out because a lot of students remin confused in this.
Ok,let me explain you with an example.

Suppose, 4 is divisible by 2.
that means if I divide 4 by 2 i will get remainder as 0.
or in other words, 4 is a multiple of 2.

So, if n is divisible by m

→ n is a multiple of m.

Thanks

Yup valid for negative numbers as well