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?

What is the word or phrase below?
R | E | A | D

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

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

why?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

what's the probability of getting a king or a queen from a pack of 52 cards?

What is common among 11, 69, and 88?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Find the last number in the series below:

voN luJ yaM raM ---

Take one out and scratch my head, I am now black but once was red. What am I?