Null set

A null set is like an empty box of toys. Imagine you have a box to fill with toys, but you have no toys to put in it. That box is like a null set, which means it has no elements or things inside.

In math, a null set is a set that doesn't contain any elements or members. That means it's completely empty, just like the toy box without any toys.

For example, if we have a set of numbers between 1 and 10 that are divisible by 20, we won't find any numbers in the set. So, our set in this case is a null set.

Null sets are important in math because they help us understand the properties of sets and how they work. They also help us differentiate between sets with actual elements and those without any elements.

So, to summarize, a null set is an empty set with no elements, just like an empty toy box with no toys inside.