What happened when the wheel was invented?

A sundial has the fewest moving parts of any timepiece. Which has the most?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

What word begins and ends with an E, but has only one letter?

Count the number of triangles in the below picture?

There is a basket full of hats. Three are white and two are black. Three men, Tom, Tim, and Jim, each take a hat out of the basket and put it on their heads without seeing the hat they selected or the hats the other men selected. The men arrange themselves so Tom can see Tim and Jim’s hats, Tim can see Jim’s hat, and Jim can’t see anyone’s hat. Tom is asked what color his hat is and he says he doesn’t know. Tim is asked the same question, and he also doesn’t know. Finally, Jim is asked the question, and he does know. What colour is his hat?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

Can you count the number of triangles in the given figure?