What runs around the whole yard without moving?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

What is next number in the pattern below:

131 517 192 123 ?

You can win me and lose me but never buy me
You can not eat me and never want to part with me
I can make you cry or bring you joy
I am not a machine and definitely not a toy
You keep me but i am not forever just yours
You might find me in a case or on a shelf next to a vase
I am hard and i am tall if you bump me i am sure to fall
I am made of different materials and am at many events
If your lucky and fight hard I might be yours
What am I ?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

What do you see in the given picture?

What four weights can be used to balance from 1 to 30 pounds?

What is black when you buy it, red when you use it, and gray when you throw it away?