Dear Amy: What is a perfect number? — Jasmin, Cavite City, Philippines
Dear Jasmin: A perfect number is a whole number and an integer greater than zero that has a special property. When you add up all the factors less than the number, it should equal that number. For example, 6 is a perfect number. Its factors, 1, 2 and 3, add up to 6. There aren't very many known perfect numbers. So far, only 47 have been found. To find out more, visit Dr. Math’s page on perfect numbers at http://mathforum.org/dr.math/faq/
Dear Amy: What's the best website for students to learn about pets? — Abigail, Cocoa, Fla.
Dear Abigail: There are lots of cool places to learn about pets online. One site that makes learning about pets fun is Creature Features, www.abc.net.
au/creaturefeatures. You can read about celebrity pets, check out video clips and learn all kinds of pet facts. For pet care tips, a great place to go is The Humane Society of the United States website, www.humanesociety.org/
animals/pets. You’ll find everything you need to know about caring for the most common pets, such as cats, dogs, guinea pigs and more. It’s doggone interesting!
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