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

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?

Can you make a six-letter word using the letters N, A and B ?

Why are all black people so quick ?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

What has many keys but can’t open a single lock?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?