Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Where do you go to learn how to make ice cream?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

How many times can you subtract the number 5 from 25?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

What part of Turkey has the most feathers?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

Take one out and scratch my head, I am now black but once was red. What am I?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?