What's the next in the series?

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

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?

Move three sticks of the spiral below to form a square.

Can you count the number of lines in the below picture?

A and B have a certain number of chocolates with them. If B gives one chocolate to A, they will have an equal number of chocolates. But if A gives one chocolate to B, then A will be left with half the number of chocolates that B has.

Can you find out the number of chocolates they have right now?

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

Out of four images which one is the odd one out?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Solve the equation in the image by looking at the pattern closely.

What is 3/7 chicken, 2/3 cat and 2/4 goat?