Can you fill the blank with the correct number?

6 30 870 756030 _____

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

Four cars come to a four-way stop, each coming from a different direction. They can’t decide who got there first, so they all go forward at the same time. All 4 cars go, but none crash into each other. How is this possible?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

How many bananas can you eat if your stomach is empty?

why number 8549176320 is one of a kind?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?