What's the next in the series?

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

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

A man is found unconscious in front of a store at two in the morning. His head is bleeding and there’s a brick laying next to him. When the police arrive, they carry the man to jail. Why did they arrest him?

If EELS + MARK + BEST + WARY = EASY

What does HELP + BARK + WARD + LEAD equal?

Using Only Five 5's and any mathematical operator make sum as 37

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.