What happened when the wheel was invented?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

What is the end of everything?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

I look at you, you look at me I raise my right, you raise your left. What am I?

What can you hold in your right hand, but never in your left hand?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

By what process could you make a 'Tea-Table' into food?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?