Riddles of What do tigers sing at Christmas?

I am seen in the water and in the sky. I am in the rainbow and a jay’s feather.
What am I?

Answer

Blue.

You may run with me but if you sit you will waste me.
What am I?

Answer

Time.

I give you a group of three. One is sitting down, and will never get up. The second eats as much as is given to him, yet is always hungry. The third goes away and never returns.

Answer

Stove, fire, smoke.

I dig out tiny caves, and store gold and silver in them. I also build bridges of silver and make crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs my help, yet many people are afraid to let me help them.
Who am I?

Answer

The dentist.

Rihanna will go see ballet but not the opera. Her favorite number is eight and she doesn’t like nine. She likes salmon but not trout. She hates Mondays and likes Wednesdays.
Does she use a comb or a brush?

Answer

A comb. Rihanna likes words with silent letters, like her name.

At noon the hour, minute, and second hands coincide. In about one hour and five minutes the minute and hour hands will coincide again.
What is the exact time (to the millisecond) when this occurs, and what angle will they form with the second hand?
(Assume that the clock hands move continuously.)

Answer

There are a few ways of solving this one. The given situation (when the hour and minute hands overlay) occurs in 12 hours exactly 11 times after the same time. So it’s easy to figure out that 1/11 of the clock circle is at the time 1:05:27,273 and so the seconds hand is right on 27,273 seconds. There is no problem proving that the angle between the hours hand and the seconds hand is 131 degrees.

What has no beginning end or middle?

Answer

A donut.

Why are there fences around cemeteries?

Answer

Because people are dying to get in!

Why do squirrels spend so much time in trees?

Answer

To get away from all the nuts on the ground.

What did one knight say to the other?

Answer

Let us call it a day.