What country can make you shiver?

In which direction should the missing arrow point?

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

How many minutes are there in Feb 2017?

Note: The shortest answer is the correct answer.

Why do people go to bed?

What jumps when it walks and sits when it stands?

Can you name four days which start with the letter 'T'?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

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?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.