Home > Prealgebra > Greatest Common Factor

What is the GCF of 18 and 30?

Answer 1

Luna Angel

#6#

#"this method uses only "color(blue)"subtraction"" to find GCF"#

#• " Subtract smaller number from larger number"#

#• " Repeat this until a "color(red)"common value ""is obtained"#

#• "The "color(red)"common value ""is the GCF"#

#•color(white)(x)30" and "18larrcolor(blue)"starting numbers"#

#30-18=12larr"larger subtract smaller"#

#•color(white)(x)18" and "12larrcolor(blue)"numbers after subtraction"#

#18-12=6larr"larger subtract smaller"#

#•color(white)(x)12" and "6larrcolor(blue)"numbers after subtraction"#

#12-6=6larr"larger subtract smaller"#

#•color(white)(x)6" and "6larrcolor(red)"common value"#

#rArr"GCF "=6#

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Everly Taylor

The greatest common factor (GCF) of 18 and 30 is 6.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.