In this example, we will find the greatest common factor of 132 and 500:
Press MATH and scroll over to NUM on the top.
Scroll down and select option 9, "gcd(". (This stands for greatest common denominator.) Type the first number, followed by a comma, followed by the second number. Then type and ending parenthesis. In this example, you should have:
gcd(132,500)
Press ENTER. In this example, the answer should be 4.
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