A number has many factors including 3 and 8. What other number must also be a factor of the same number?


  1. Two “factors” are multiplies together to product another number (the product).  So, for example, the prime factors of 10 are 2 and 5.  Prime factors that, themselves, have only factors of 1 and themselves.  Non-prime numbers, like 10, have prime factors.  Note that 1 is a factor of all integers.
    If the two factors are equal (the same), like 4*4=16, then each of them is called a “square root.”
    Note: a cube root is one of three equal factors of a number, for example, 2 is the cube root of 8 (that is, 2*2*2=8).
       What is the square root of 49?
       What is the square root of 100?
       What is the square root of 625?
       Memorize the squares of the numbers from 1 to 10, or 1 to 20  — that will be very helpful in math classes.


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