What is both possible and impossible at the same time?

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?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

What is always in front of you but can’t be seen?

What goes through cities and fields, but never moves?

I am the first thing you need while camping.
I am always with the person named Marcos Valencia and Carrick.
But Pogba Zlatan and Rooney think I am wasteful and do not need me.
I am the second to the last thing to add when you are making a patch.

What am I?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

How can you tell a raw egg from a hard-boiled egg?