What does this rebus riddle means ?

Can you name some countries which do not have the alphabet 'A' in them?

How can you make number one disappear by adding something to it?

Can you count the number of triangles inside a triangle?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

The Judge knows that Alamgir was killed by his girlfriend Jasline, but the judge is unsure whether to punish her. Why?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

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?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

Guess the hidden movie name?