Our product and our sum always give the same answer. Who are we?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

Identify the 10 differences between the two given pictures.

Can you count the number of triangles in the picture below?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Can you find the missing piece of the Porsche?