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.

Why do we preferably have round manhole covers and not square ones?

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

What does the below rebus puzzle mean?

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?

Guess the hidden movie name?

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Find the next number in the following series:
6, 14, 26, 98, __?

Using Only Five 5's and any mathematical operator make sum as 37