I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

John was piloting a plane behind a car but was never able to overtake it. Why?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

What does the below rebus riddle means?

Count the number of squares in the picture below.

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

why?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?