How to find Prime Numbers between 1 and 100

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Step by step directions for finding the prime numbers between 1 and 100 • Prime Composite Numbers • • A prime number has only two factors, 1 and itself. • • A composite number has more than two factors. • • “1” is a special case. It is neither prime nor composite since it has only one factor, which is 1. • • “2” is the only even prime number. All other even numbers are divisible by 2, so all other even numbers are composite. • Let’s find the prime numbers from 1 – 100… • • Put a box around “1” because it is neither prime nor composite • • Circle “2.” It is the first prime number. Now cross out all multiples of 2. • • Circle “3.” It the next prime number. Cross out all multiples of 3. • • Circle “5.” It is the next prime number. Cross out all multiples of 5. • • Circle “7.” It is the next prime number. Cross out all multiples of 7. • • Highlight all numbers circled or not crossed out – these are the PRIME numbers from 1 – 100. There should be twenty-five prime numbers. • Please visit my website for more Math help • http://www.moomoomath.com/ • ~-~~-~~~-~~-~ • Please watch: Study Skills Teacher's Secret Guide to your Best Grades • • My new book-Study Skills Teacher's Se... • ~-~~-~~~-~~-~

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