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What Are Prime numbers, GCF and LCM?

A prime number is a number that is only divisible by 1 and itself: 2, 3, 5, 7, 11, 13, 17, and so on. Notice that no even numbers can be prime, except for 2. Every “regular” number (like 1, 2, 3, 4, and so on) can be factored into prime numbers. Prime numbers have exactly two factors.

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Learn More About Factoring Numbers!

"Factors" are the numbers you multiply to get another number. For instance, factors of 15 are 3 and 5, because 3×5 = 15

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Mathematics of Ancient Egypt

The early Egyptians settled along the fertile Nile valley as early as about 6000 BCE, and they began to record the patterns of lunar phases and the seasons, both for agricultural and religious reasons.

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