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

What does this mean?

CCCCCCC

What month of the year has 28 days?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

During a secret mission, an agent gave the following code to the higher authorities
AIM DUE OAT TIE MOD

However, the information is in one word only and the rest are fake. To assist the authorities in understanding better, he also sent them a clue, If I tell you any one character of the code, you can easily find out the number of vowels in the codeword.

Can you find out the code word?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

What is the next number in the series?

15 29 56 108 208 ?

To attend world science seminar, A famous chemist from Mexico visit
London. In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "76-20-44 79-16-22-7"

A local detective Jack was called to solve the case,

After reading the note, Jack instantly asked the police to arrest the murderers.

Who are the murderers?

What has many teeth, but cannot bite?

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?