Suppose your child says, “Mommy or Daddy, why don’t you give me 1 cent on the 1st, then double it on the 2nd, & continue doubling until the 31st day of month. “Sure”, you say. “The kid’s been great this year and I can afford it”. Let’s see!

Below is a series of integers. All, but 1, have 2 things in common. Which one does not belong and why? This is a very simple problem, but far from obvious. Answer will be published on October 15th.

Quadratic Root Equation: You may know it by heart. But can you prove it, thereby showing how it was achieved? No? Well, read on. First we prove the equation; then we demonstrate how to use it to solve any 2nd degree polynomial equation.

Film 'Contact': Extraterrestrials identify selves by sending Prime Numbers as signal. 1 beat - Pause, 2 - Pause, 3, 5, 7, 11, 13, 17, 19, 23, etc. to 97. Doing this leaves no possibility that beats were random or natural. That ET is clever!

If you fell from the roof of a building that is 256 feet tall, how long would it take you to crash into the ground? Show 1- Your answer 2- your math.

Your job, should you decide to accept it, is to travel to the riverbank, scoop up a pail of water and go to the door in the marvelous house I drew, taking the shortest path. What is the shortest path, and how do you determine it? - Plain G

A novelty store has 100 toy animals to sell: toy cows $5 each, toy horses $1 each, and toy sheep $.05 each. Total number of animals is 100. The total in sales is $100. For Q&A, click "Read More" below. No cheating means no help from kids.