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 does below Rebus say?

XLR8

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?

Count the number of triangles in the below picture?

81 x 9 = 801. What must you do to make the this equation true?

Identify the hidden meaning behind this picture?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

There is a number which when you multiply by 3 and subtract 2 from the result, then the resulting number is the reverse of the actual number.

What is the smallest number that stands true on the statement?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?