Where do you go to learn how to make ice cream?

What is the centre of gravity?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

I cannot talk, but I always reply when spoken to. What am I?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

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

Why Aeroplane windows are round?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?