what is the greatest common of 60 and 84 and how did you if it?
343166
12.\nPrime factorization of each number:\n               \n60= 2x2x3x5\n84= 2x2x3x7\n    \n60 and 84 share the prime factors of 2, 2 and 3. So, you multiply those together to get 12.
1106146
There are two common ways.   If the numbers are small and you can eyeball it, the best way is to split each number into it's prime factors and then cancel out.\n\nE.g. 12 and 30\n\n12 = 2 x 2 x 3\n30 = 2 x 3 x 5\n\nGreatest common divisor = 2 x 3 = 6\n\nThe least common multiple is related to the GCD by\n\nA x B = GCD x LCM\n\nThe better way to do GCD's for big numbers is to note that if a number divides A and B, then it divides A - B, A + B, and in fact A - k*B for any k (i.e. A minus any multiple of B).\n\nSo you take the bigger number, say A, do long division with remainder to get:\n\nA = k * B + remainder\n\nGCD(A, B) = GCD( B, remainder)\n\nBoth B and the remainder are smaller than A.  You keep doing that until the number divides exactly or you end up with one.  If the number divides exactly that is the GCD, otherwise it's one.\n\nE.g. \n30 = 12 * 2 + 6\n12 = 6 * 2 exactly GCD = 6
66482
use the formula: gcf(A,B)*lcm(A,B)=A*B\nIn this case A=8; B=x; gcf=1; lcm=24\nYou get 1*24=8x\n8x=24\nx=24/8\nx=3\n\nLittle task: give a reason for the formula...
816611
hi,\n  regarding lcm of a set of numbers.....\n\n  the lowest common multiple (lcm) of two whole numbers\n  is the smallest whole number which is a multiple of both.\n\n  consider the numbers 12 and 15-----\n  the multiples of 12 are : 12, 24, 36, 48, 60, 72, 84, ....\n  the multiples of 15 are : 15, 30, 45, 60, 75, 90, ....\n\n  60 is a common multiple (a multiple of both 12 and 15),  \n  and there are no lower common multiples.\n\n  therefore, the lowest common multiple of 12 and 15 is \n  60.\n\n  now try it yourself for 120 and 130.
82452
356,644,602,007 \nexactly
244396
this one is very easy\nsince it is actually a selection the answer will be given by\n9C3\n9C3 is equal to 84 \nso wasnt that easy and do ans my question
1093659
Or is it this:\n300+20+4\n400+60+7\n100+10+1\n800+90\n60+8\n1000+600+50+4
923846
Answer 1:\n59, 61 and 67 are all the primes between 55 and 70\n\nAnswer 2:\nThe Greatest Common Factor of 8 and 3 is 1. It can never be higher than 80. Even if it's the LCM you want, the answer is 24. Maybe you typed the 8 by mistake.\n\nAnswer 3:\nWhile searching for common multiples of two different primes, multiply the two and search for the product's multiple.\n7*5 = 35\nWe need a multiple of 35 between 150?\nOOps! What do you mean between 150?
770110
"Find the highest common factor of . . ." means to find the highest whole number that goes into both of your numbers. For example, say your 2 numbers are 16 and 24. Then 1, 2, 4, and 8 are all factors of both numbers, but 8 is the highest.\n\n"Find the lowest common multiple of . . ." means to find the smallest number that both of your numbers are a factor OF.  For example, say your 2 numbers are 16 and 24 again.  There are infinite numbers that both will go into, but the lowest of them is 48.
875190
Perform a prime factorization of each number:\n16 = 2 x 2 x 2 x 2\n36 = 2 x 2 x 3 x 3\n\nTo find the lowest common multiple, you need to take each prime factor, enough to cover both numbers.  In other words you need four of the 2s and two of the 3s.\n\nLCM(16, 36) = 2 x 2 x 2 x 2 x 3 x 3\nLCM(16, 36) = 144\n\nThe other people might be thinking greatest common factor, but even that answer is wrong since the GCF(16, 36) is 4, not 2.
468211
The least common multiple of 3, 5, and 8 is 120.  The greatest common factor is 1.
985975
take - common\n -(y^2-9y+20)\n-(y^2-5y-4y+20)\n-(y(y-5)-4(y-5))\n-(y-4)(y-5)
412968
70\n\ndivide 30 by a half equals 60
702912
150:350  divide terms by common factors\n15:35\n3:7
801140
60.  Because 120 doesn't go into 1260 evenly.  But 60 (or 120/2), which would be your next choice, does.  And if 60 didn't work, you would have next tried 40 (120/3), then 30 (120/4), then 24 (120/5) and so on.
329833
63 and 65 would both work....my guess, having to choose between the two, would be 65.
389726
Unfortunatly, you will have to list the factors of each and then find the common and then the greatest common factor (GCF). \n\nIf you know the rules for finding factors it helps:\n\n2: goes into even numbers\n3: add the digits together and if the sum is divisible by 3 then the 2 digit number is (example 45: 4+5=9 and 9 is divisible by 3 so 45 is, too)\n5: all numbers that have a 0 or 5 in the one's place\n \nGood luck!