How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

How can you tell a raw egg from a hard-boiled egg?

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.

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

A Shopkeeper sold a few chickens to four different customers on a particular day. It was such that each customer purchased half of the remaining chickens and half the chicken more.

Can you find out how many chicken were sold by the shopkeeper on that day if we tell you that the fourth customer bought a single chicken ?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Consider this about a word: The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

People make me, save me, change me, raise me. What am I?