I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Two brothers were watching a horror film on video late one night. One brother dozed off and dreamed that he was being chased by the crazy man from the movie, who was trying to kill him. In the dream, he hid in a cupboard. There was no sound except his heart pounding, and he had no idea where his crazed captor was. He was terrified! At that moment, the video finished, and his brother put his hand on the shoulder of his sleeping sibling to wake him. The shock at that tense moment was enough that the sleeping brother suffered a massive heart attack and died instantly. True or false?

Buy me, smell me or deliver me, I do not change.

Who am I?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

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.

Which country gets ill every time?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?