2006-11-15 16:11:43 · 11 answers · asked by Rawr 2 in Education & Reference ➔ Homework Help
84 is LCM.
2006-11-15 16:13:25 · answer #1 · answered by urbancoyote 7 · 2⤊ 0⤋
Heres an easier way to determine the least common multiple
Take the highest number of the set, which is seven list muliples of each number up to the value of that factor, 7. (You may have to list more than 7 multiples in each set)
Multiples are written as 3, 4 and 7x
3x (3,6,9,12,15,18,21)
4x (4,8,12,16,20,24,28)
7x (7,14,21,28,35,42,49)
Now look for any doubles or tripples. There are no tripples but how many doubles? A few 12 (3x and 4x), 21 (3x and 7x) and 28 (4x and 7x). You will see this makes some sense because there is a double for every combinatioon of factors 3 & 4, 3&7 and finally 4 and 7. The LCM will be divisible by the lowest factor in the set and the lowest duplicated multiple of all three sets. so since the lowest duplicated multiple is 12 and multiple by all 3 factors which are 3 4 and 7. Then your answer must be either 12*3=36; 12*4=48 or 12*7=84. In this case 36 does not divide into 7, and neither does 48, the only answer you have left is 84, your LCM.
2006-11-15 17:04:55 · answer #2 · answered by josh_rittinger 2 · 0⤊ 0⤋
84
2006-11-16 02:54:07 · answer #3 · answered by krishna v 2 · 0⤊ 0⤋
7*3*4=84
2006-11-15 16:14:50 · answer #4 · answered by Anonymous · 1⤊ 0⤋
84, 3*7*4=84
2006-11-15 16:16:01 · answer #5 · answered by John C 2 · 1⤊ 0⤋
252
2006-11-15 16:31:36 · answer #6 · answered by Joey Joe, yo 5 · 0⤊ 0⤋
86
2006-11-15 16:13:32 · answer #7 · answered by Anonymous · 0⤊ 1⤋
it is 84
2006-11-15 16:14:12 · answer #8 · answered by raj 7 · 1⤊ 0⤋
same as the meaning of life in that douglas adams book, 42
2006-11-15 16:13:56 · answer #9 · answered by rand a 5 · 0⤊ 1⤋
www.doyourownhomework.com
2006-11-15 16:27:20 · answer #10 · answered by sweetsomething2003 2 · 1⤊ 0⤋