# Featured

## Dollar Words Ascending Values = 100 Algebra with Addition and Multiplication

This week we introduced algebra to the children with an exercise I call Dollar Words. Algebra uses letters and symbols to represent numbers. The Dollar Word challenge ascribes values to each letter by its position in the alphabet in ascending order. A=1, B=2, C=3 … Z=26. If the sum of all of those values equals exactly 100, it is a Dollar Word.

## Reverse Add Rule for finding Palindromes

Given any number, you can use the following simple algorithm to find other palindromes.

Step 1:

## Palindrome Week, Words, n-digit numbers, odometer readings

**PALINDROME****: **In mathematics, a palindrome is a number that reads the same forward and backward. For example, 353, 787, 1331, 42724.

## What Is The Largest Number Smaller Than Five?

When my sons were in 11th grade at Dover/Sherborn High School, their AP BC Calculus teacher, Mr. Bridger, used to start every year with a question: “What Is The Largest Number Smaller Than Five?”

## Volume and surface area of Human Body, World Population of Living Matter

When doctors see patients, they almost always take two measurements first: height and weight. Yes, they want to track their patient’s progress but more importantly, they need to understand the patient’s volume and surface area for prescribing medicine.