What does this mathematical rebus means ?

There are two insects on a tile. Insect X is sitting on one side of the tile (point A) and Insect Y is sitting opposite on the other side of the tile (point B). Now both of them decide to change their position and thus X starts crawling to point B and Y starts crawling to point A. When they meet and pass each other in between, X takes 20 seconds to reach B and Y takes just 5 seconds to reach A.

Can you calculate the total time each of the insects took to change their positions?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Can you tell a 3D object that has just two surfaces?

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

What is the last thing you take off before bed?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?