first you list the factors of them then you find the first number that has 3 of the same for each one then from there just keep going on like that until you finish it
The division ladder is a method used to find the greatest common factor (GCF) of two numbers by listing the factors of each number. To find the GCF of 82, you would start by factoring the number 82. The factors of 82 are 1, 2, 41, and 82. Therefore, the GCF of 82 is 1.
Extension Ladder
GCF = Greatest Common Factor. In other words, let's say the number is 10 and, oh, 100. So, what is the number that both 10 and 100 can be divided by? 1,2,5,and 10. But since 10 is the greatest, the GCF is 10. We can do this ladder form: (100,10) 2(50, 5) 5(10,1) 2x5 is 10! if there is an extra, like if it is 9,2, but you cant divide further, IGNORE it.
800 400,2 200,2,2 100,2,2,2 50,2,2,2,2 25,2,2,2,2,2 5,5,2,2,2,2,2
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No.
The GCF is 3.
The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question! The greatest factor of any number is itself. So you do not need to use the division ladder or any other method!
Don't bother. Since 25 is a factor of 75, it is automatically the GCF.
2 |10,18 , |_________ 5,9 The GCF is 2.
15 5,3 10 5,2 The GCF is 5.
155,3105,2The GCF is 5.The GCF of 10 and 15 is 5.
22 11,2 There are no elevens in 60, so the GCF has to be 2.
No matter what you use, you still need at least two numbers to find a GCF.
Division Ladders are useful for finding Greatest Common Factors, also known as Greatest Common Divisors. If your math problem is to find the GCF of 32, 24 and 40 using a Division Ladder, you would find the answer thusly: 2 |32, 24, 40 , |_________ 2 |16, 12, 20 , |________ 2 | 8, 6, 10 , |________ , 4, 3, 5 You would be dividing by 2 in this case, then multiply your divisors, 2 x 2 x 2 = 8. Your Greatest Common Factor for 32, 24 and 40 is 8. I used the commas for placeholders, as without them, the vertical lines don't line up.
It doesn't matter if the expression is negative, the greatest common factor will still be positive, since you only count the left side of the ladder. When the left side is mutiplied together, it will be positive, because the negative side is on the right side. Therefore, just keep dividing the negative, but it will not affect the common factor
Division Ladders are useful for finding Greatest Common Factors, also known as Greatest Common Divisors. If your math problem is to find the GCF of 32, 24 and 40 using a Division Ladder, you would find the answer thusly: 2 |32, 24, 40 , |_________ 2 |16, 12, 20 , |________ 2 | 8, 6, 10 , |________ , 4, 3, 5 You would be dividing by 2 in this case, then multiply your divisors, 2 x 2 x 2 = 8. Your Greatest Common Factor for 32, 24 and 40 is 8. I used the commas for placeholders, as without them, the vertical lines don't line up.