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.

I’m orange, I wear a green hat and I sound like a parrot. What am I?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

Do You See It?

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

What Is It?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

I am the fastest animal but cannot climb the tree. What am I?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?