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Question

What is the Greatest common factor of 45 and 77 ???

plz help me, thanx!! i promise 2 whom evr's answer is the best i will choose u 4 the best answer.

Answer 1

First find all factors of 45 and 77

45 factors as 3 * 3 * 5

77 factors as 7 * 11

As you can see, they have no common factors, so the greatest common factor is 1

Answer 2

I'm going to show you how to do this, step by step, so that you don't have to ask for help next time. You'll be doing it on your own in no time.

First, you have to list the factors of each number. A factor is a number that multiplies with another number to make the ending answer.
So, for example two factors of 6 might be 2 and 3 because 2x3=6. Get it?
So, to list all the factors of 45, start with 1. 1 is is factor in every number. Now, think: What is the next biggest number that goes into 45? The answer should be 3. Keep doing this process until you get all of the factors of 45:

1, 3, 5, 9, 15, 45

The factors of 77 would then be:

1, 7, 11, 77

TO find the greatest common factor, just look foir the larget number the two sets have in common. For this pair, it would be 1.

Hope I helped!

Answer 3

First list all the factors of 45...

If you don't know how to do this, just pair all numbers that multiply to make 45

1 x 45 = 45
3 x 15 = 45
5 x 9 = 45

So 1, 3, 5, 9, 15, and 45 are all the factors of 45...

Now factors of 77

1 x 77 = 77
7 x 11 = 77

and that's it. So the greatest common factor of 45 and 77 would be the largest number that the two share... which is ..... 1.

*Note* careful using the "prime factorization" as mentioned above, that will give you the prime number factors of each, and you have to know how to find the greatest common factor, so in that case, you would multiply together and prime common factors if there were more than one.

Answer 4

1

Answer 5

Factor both numbers:
45 = 3*3*5
77 = 7*11
Since 45 and 77 have no prime factor in common,
their GCF is 1.
They are relatively prime.

Answer 6

The greatest common factor of 45 and 77 will be the number
you get by multiplying 45 times 77. Then, that number will be divided by both 45 and 77. Then, the greatest common factor of that number will be 77. 45 times 77 = 3465.

Answer 7

It is 1. There is no other factor in common between those 2 numbers

Answer 8

an easy way to do this is first of all look for the number that can go into both of them. that is your highest common factor. so the highest common factor of this is 1.
if a question says find the highest common factor of 12 and 16
you look at it this way.
2 goes into both of them then it remains 6 and 8
2 still goes in then it remains 3 and 4
there is no other number that can go into both of them apart from one. the remaining so
1x 2 x 2=4

Answer 9

answer is 1.


as there is no common factors between the two.. except 1.


means no number can divide the given two number at a time.