What has to be broken before you can use it?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

How can you take 2 from 5 and leave 4?

Can you solve this picture maths equation?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

Can you find the missing piece of the Porsche?