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

What goes up but never comes down?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

The below mentioned letters have been placed in a order using a logic.

DEAD, BALL, FEAR, SHOP

Can you find the logic?

You’ll find me on Mercury, Earth, Mars, Jupiter, Saturn, and Uranus. But never Neptune, or Venus. What am I?

How many times can you subtract the number 5 from 25?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

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?