Name a key which is hardest to turn.

what does the below math rebus puzzle mean?

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.

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Which alphabet is a part of our body?

Dwayne Johnson was running away with the loot from a heist in his car along with Vin Diesel. One tire was punctured and he dropped down to replace it. While changing the wheel, he dropped the four nuts that were holding the wheel and they fell into a drain. Vin Diesel gave him an idea using which they were able to drive till the rendezvous point.

What was the idea ?

I look at you, you look at me, I raise my right, you raise your left. What am I?

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?