What is in seasons, seconds, centuries and minutes but not in decades, years or days?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Solve the counting riddle by identifying the number of triangles in the given picture.

What does this mean?

CCCCCCC

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

Why is the Hole below a Lock?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

A wealthy man lives alone in a small cottage. Being partially handicapped he had everything delivered to his cottage. The mailman was delivering a letter one Thursday when he noticed that the front door was ajar. Through the opening he could see the man's body lying in a pool of dried blood. When a police officer arrived he surveyed the scene. On the porch were two bottles of warm milk, Monday's newspaper, a catalog, flyers, and unopened mail. The police officer suspects it was foul play. Who does he suspect and why?