We love numbers. In this collection, we will put resources about numbers.

Natural number, successor of a natural number, prime number, composite number, prime factorization, factors, proper factors, sum of factors, sum of proper factors, deficient number, perfect number, abundant number, square number, cubic number, triangular number, factorial number, Fibonacci number, palprime, emirp, atomic numbers of atoms (number of protons), et cetera, et cetera.

As Gaia turns we will add alakazams about whole numbers, integers, rational numbers, real numbers, and other numbers.

## Collection Contents

### Numbers 01

by Bob and George

We collect and create tools and toys for learning and teaching. Been at it for a long time. Now we're stuffing old stuff and new stuff into Microsoft Word and Portable Document Format (PDF) files such as this one. You may make copies of this file to distribute free of charge. You may print this file and distribute paper copies at no charge. We hope you find this information interesting, useful, helpful, et cetera, et cetera. We’ll appreshiate it grately if you wil infrom us of any mistrakes. THIS UNIT IS ABOUT: numbers, natural numbers, counting numbers, whole numbers, integers, odd numbers, even numbers, prime numbers, and composite numbers. And "The First Computer" by The Dragon from People's Computer Company Nov/Dec 1976.
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### Natural Numbers 1 to 99 - Tables

by Bob and George

This reference unit consists of tables of information about the natural numbers 1 to 99. It is a companion unit to Natural Numbers 1 to 99. Table 1 is a check list of characteristics: composite, prime, palprime, emirp, deficient, perfect, abundant, square, cubic, power of 2, factorial, and Fibonacci. Table 2 lists prime factorization, factors, sum of factors, and sum of proper factors. Down yonder below the numbers, there is a glossary.
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### Numbers 1 to 99: Activities

by Bob and George

This is a unit for teachers about the set of natural numbers 1 to 99. More than 100 questions, activities, and conjectures about natural numbers 1 to 99. Odd numbers, even numbers, prime numbers, composite numbers, factors, sums of factors, and so on, Plus uphill numbers, flat numbers, downhill numbers, palprimes, and emirps. This is the third unit in a set of three units. The other two units are the reference units: Natural Numbers 1 to 99 Natural Numbers 1 to 99 -Tables
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### Natural Numbers 100 to 199 - Tables

by Bob and George

This reference unit consists of tables of information about the natural numbers 1 to 99. It is a companion unit to Natural Numbers 100 to 199. Table 1 is a check list of characteristics: composite, prime, palprime, emirp, deficient, perfect, abundant, square, cubic, power of 2, factorial, and Fibonacci. Table 2 lists prime factorization, factors, sum of factors, and sum of proper factors. Down yonder below the numbers, there is a glossary.
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### Number Factories 01

by Bob and George

CONTENTS: Two number factories and half-baked ideas for a third number factory. The Digit Factory: Use the numbers 1, 2, 3, 4, and 5, the operations addition, subtraction, multiplication, and division, and parentheses to manufacture expressions whose values are decimal digits. The Million Factory: Use decimal digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9, the operations addition, subtraction, multiplication, division, and exponentiation, and parentheses to manufacture expressions whose value is 1,000,000 (one million)
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### Palprimes and Emirps 01

by Bob and George

A palprime is a palindromic prime number, a prime number that when reversed (read right to left instead of left to right) is the same prime number. 11, 101, 373, and 929 are palprimes. An emirp is a prime number that is the reverse of a different prime number. The word 'emirp' is the reverse of the word 'prime'. Emirps occur in pairs: 107 and 701, 347 and 743, 769 and 967.
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### Oregon Zip Codes

by Bob and George

Investigate a list of 484 Oregon Zip Codes. Find odd numbers, even numbers, prime numbers, composite numbers, deficient numbers, perfect numbers, abundant numbers, square numbers, cubic numbers, triangular numbers, powers of 2, powers of 3, factorial numbers, Fibonacci numbers, palindromes, downhill numbers, peak numbers, and wavy numbers.
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