for 少し and ちょっと do i have to use の too?

Hi Aniq, There are many Japanese words that can indicate "some". Here's a few examples: すこし、ちょっと、いくつか、多少の、 For "some cases, this happens while in other cases...", you can use "いくつか"のケース... いくつかの is used when it indicate something is countable. すこし and ちょっと are used when they indicate something uncountable. 多少 almost means "a little bit", but it sometimes means "some" (for example, 多少の変化 means a little bit of change or some changes). Hope it helps you.