What is the greatest common factor of 42 and 54 ?
83408
6 because 6*7=42 and 6*9=54
243453
It may actually be more helpful if somebody would provide the instructions for solving this.  So here it is:\n\nLCM - simply use prime factorization\n12 - 2x2x3\n18 - 2x3x3\ngroup together the common factors, namely the two 2's and the two 3's.  multiply the product of the common factors (2x3 = 6) and multiply this by the remaining factors (2 from 12 and 3 from 18) - this will result in 36.\n\nGCF - still use prime factorization\n24 - 2x2x2x3\n40 - 2x2x2x5\nsimply group together the common factors. in this case, th three 2's.  so multiply the three 2's together and you arrive at the GCF of 8.
55048
9b+4(8c+c)-54=15c-13b+5\n\n9b+32c+4c-54=15c-13b+5\n\n9b+36c-54=15c-13b+5\n\n9b+21c-54=(-13b)+5\n\n21c-54=(-22b)+5\n\n21c=(-22b)+59\n\nc=(-22b+59)/21
224090
take these \n4 8 15 16 23 42\n\nLOST! :)
287432
Yes it is *54.  but you have to have the phone number and enter it and the recording will tell you who the phone is listed to and the billing address of that number.  Hope tis helps.
965509
Like before.. sqrt(28*18) = sqrt(504) = 22.4499, approx.
524129
m > 42.\n\nm - 13 is greater than 29. \n\nSo you add the 29 and the 13.\n\nso m must be greater than 42, hence the answer m > 42.
199487
6\n\nShowing work:\n\nYuo need to find all the prime factors of both numbers:\n\n12 = 2*2*3\n54 = 2*3*3*3\n\ntake out what they have in common: 2*3\n\n2*3 = 6, your greatest common factor!
3325
the main answer is 42!
16272
the number 42 or to reproduce
847706
You want the greatest common factor (not the lowest common multiple) to be 42... A few other answerers are giving you numbers that would be have 42 as their LCM, not GCF.\n\nSo just multiply 42 by a couple of numbers that are relatively prime.\n\n(Numbers that are "relatively prime" have no prime factors in common.)\n\nFor example 42 x 2 and 42 x 3\nor 42 x 6 and 42 x 35\nor 42 x 7 and 42 x 18\netc.\n\nThe easiest case would be 42 x 1 and 42 x 2\nGCF (42, 84) = 42\n\nBut other choices include 42 x 2 and 42 x 3:\nGCF (84, 126)\n\n42 x 10 and 42 x 3\nGCF (420, 126)\n\netc.\n\nThere is no single answer to this problem, but there are wrong answers.  :)
792528
Do a prime factorization of each number:\n\n18 = 2 x 3 x 3\n30 = 2 x 3 x 5\n42 = 2 x 3 x 7\n\nThe prime factors they have in common are a two (2) and a three (3).\n\n2 x 3 = 6\n\nGCF(18, 30, 42) = 6
1037756
Instead of just giving you the answer as I did for your other question, let me explain what GCF and LCM are, and give you a general method for finding them.\n\nThe GCF, or greatest common factor of two numbers, is the largest integer which is a factor of both numbers - that is, both numbers can be divided by it with no remainder. There are three general methods for finding the GCF:\n\n1: guess and check\n\nTo find the GCF of two numbers A and B, start with the lower of the two numbers (let's assume it's B), and check all the numbers B, B/2, B/3, B/4... 1 to determine whether they are integers, and if they are, whether they are factors of A. The first number tested that meets both of these criteria is the GCF. This method is the simplest, but also by far the slowest, unless you get lucky and the GCF is one of the first few numbers tested.\n\n2. prime factor decomposition\n\nDecompose both A and B into products of prime factors (this step is not trivial). Then find all of the prime factors that appear in BOTH the prime decompositions of A and B, and if any factors appear multiple times in either product, write down that factor the same number of times that it appears in the product that contains the least number of that factor. Then find the product of these numbers to get the GCF of A and B. For instance, if your numbers are 728 and 196, your prime decompositions would be (2*2*2*7*13) and (2*2*7*7), thus your GCF would be (2*2*7), which is 28. The most time-consuming step in this method is finding the prime factors, however, many of the numbers you work with in math class and in real life have obvious prime factorizations, so when working with small numbers (2-3 digits), this is often the best method in practice.\n\n3: Euclid's method\n\nFor finding the GCF of large numbers, neither of the above methods are usually sufficient. Fortunately, there is a faster method. Let A mod B be the remainder of A divided by B - e.g. 9 mod 4=1. Then we may find the GCF of A and B as follows: find A mod B. If the answer is zero, then B is the GCF and we are done. Otherwise, find the GCF of B and A mod B. Repeat this procedure until you get zero. The last number you divided by is your GCF.\n\nExample: finding the GCF of 78920 and 65109.\n78920 mod 65109=13811\n65109 mod 13811=9865\n13811 mod 9865=3946\n9865 mod 3946=1973\n3946 mod 1973=0\n\nThus the GCF of 78920 and 65109 is 1973.\n\nWhy this works: the Euclidian algorithm is based on the observation that if two numbers have a common factor, then the remainder of these numbers after division also has that factor. This is easily shown as follows: if q is the quotient of A/B and r is the remainder, then A = qB + r, with q and r integers. Divide both sides by f: A/f = qB/f + r/f and thus r/f = A/f - qB/f. Suppose f is a factor of both A and B: then A/f and B/f are also integers, and as q is an integer, qB/f is also an integer. Since the difference of two integers is also an integer, r/f is an integer and thus f is a factor of r. Q.E.D.\n\nThe LCM, or least common multiple, is the smallest integer that both numbers are a factor of - that is, the LCM can be divided by either of them with no remainder. Finding the LCM is pretty simple once you know how to find the greatest common factor: simply divide the product of A and B by the greatest common factor of A and B. That is: LCM(A, B) = A*B/GCF(A, B).
1001171
x ~2 + 3x = 54\n=> x~2 + 3x -54 = 0\n=> x~2 + 9x - 6x -54 = 0\n=> x(x+9) - 6(x + 9)=0\n=> (x-6)(x+9) = 0\n=> x=6\n=> x = -9\nSince i've solved ur problem, wish me on my birthday on the 25th of this month...................when I turn 14.............
426163
It's 42.  Check the link.
335428
432 \n216 and 2 \n108 and 2\n54 and 2\n27 and 2 \n9 and 3\n3 and 3 \nThe least common is 3
998698
5'4"=64"\n1"=2.54cm\n\n64x2.54=162cm