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.

What have one eye but still cannot see?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

What is more useful when it is broken?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

The more of this there is, the less you see. What is it?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

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

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

If a wheel has 54 spokes, how many spaces are there between the spokes?