What does below Rebus say?

XLR8

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.

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?