How many words can a pen with half refill write?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

I am sometimes honest
Sometimes dishonest
I can be sweet and also bitter
I can hurt you real bad and
also make u smile and blush ☺️
What am I?

I shave every day, but my beard stays the same. What am I?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

I have an apple tree , number of apple in this tree get doubles every week.

On 30th week , the tree gets completely filled with apples :-)



Can you tell me , on what week does my tree is half covered with apples ?

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

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