Why 1729 is a magic number? Answer Logically.

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?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

What word begins and ends with an E, but has only one letter?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

What can go up a chimney down, but can’t go down a chimney up?

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

What does it mean?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

What does the below mathematical rebus mean?