If a wheel has 54 spokes, how many spaces are there between the spokes?

What does below pictogram mean?

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

Which famous Hollywood movie name is hidden in the below rebus?

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 to be broken before you can use it?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

What does this say?

XLR8

Count the number of triangles in the given picture.

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??