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

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

Count the squares in the matchstick puzzle below?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Can you solve the below tricky visual equation?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.