Four is half of five. True or false?

It's true. Think roman numerals.

A sphere has three, a circle has two, and a point has zero what?

Dimensions

What goes up but never comes back down?

Your age!

There are 12 kids in a classroom. 6 kids are wearing socks and 4 are wearing shoes. 3 kids are wearing both. How many are bare feet?

5 kids have bare feet

How many cats are in a small room if in each of the four corners a cat is sitting, and opposite each cat there sit three cats, and a each cat's tail another is sitting?

Four cats, each near a tail of a cat in an adjacent corner.

If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?

5 minutes. Each machine makes a widget at a rate of 1 widget every 5 minutes.

If seven cats kill seven rats in 7 minutes, how many would be needed to kill one hundred rats in 50 minutes?

14

Three matches are sitting on a table. Without adding another make for three matches four. You are not allowed to break any of the matches.

Shape the 3 matches into a roman numeral four.

The ages of a mother and daughter add up to 66. The mother's age is the daughter's age reversed. How old could they be? (3 possible solutions)

51 & 15, 42 & 24, or 60 & 06

What number do you get when you multiply all of the numbers on a telephone's number pad?

0 (zero). Anything multiplied by 0 will equal 0.