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.

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

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

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

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

If eleven plus two equals one, what does nine plus five equal?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

During which month do people sleep the least?