What does below chemistry rebus means?

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.

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

10+10 and 11+11 can give you the same answer.

Explain how?

What does below Rebus mean ?

esgg sgeg gegs gsge

By moving just one matchstick, you need to make the below statement true. Can you do it?

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?