2007-09-27 14:48:45 · 9 answers · asked by clay c 1 in Science & Mathematics ➔ Mathematics
140
They have no factor in common so multiply them all together.
2007-09-27 14:51:21 · answer #1 · answered by ccw 4 · 0⤊ 0⤋
Any multiple of 4, 5, and 7 must be divisible by 4, 5, and 7. Since 4 = 2 x 2, this is equivalent to saying that the least common multiple must be divisible twice by 2, and once by 5 and 7. The smallest such number is 2*2*5*7 = 140.
Anytime there are no common factors, you can just multiply the numbers together. Since 5 and 7 are both prime, it's impossible for them to have common factors with 4 or with each other (except for the trivial factor 1).
2007-09-27 21:53:29 · answer #2 · answered by TFV 5 · 0⤊ 0⤋
140
2007-09-27 21:51:15 · answer #3 · answered by Nilly 3 · 0⤊ 0⤋
i think it's 140 i haven't found a smaller one. It's because they don't have an actual common multiple so you multiply them : 4x5x7 = 140, hope it helped!
2007-09-27 21:52:38 · answer #4 · answered by Anonymous · 0⤊ 0⤋
140 i believe
2007-09-27 21:51:59 · answer #5 · answered by VersatilePessimist 4 · 0⤊ 0⤋
The least common multiple of seven, five, and four's one hundred & forty.
2007-09-27 21:58:43 · answer #6 · answered by The Glorious S.O.B. 7 · 0⤊ 0⤋
Since all of those factors are relatively prime, it's their product. 140
Doug
2007-09-27 22:01:29 · answer #7 · answered by doug_donaghue 7 · 0⤊ 0⤋
140, I'm pretty sure.
2007-09-27 21:51:25 · answer #8 · answered by Anthony K 2 · 0⤊ 0⤋
140
http://72.14.253.104/search?q=cache:MplsFLRbEKUJ:www.amby.com/educate/math/2-1_LCM.html+least+common+multiple+4+5+7&hl=en&ct=clnk&cd=4&gl=us
2007-09-27 21:53:48 · answer #9 · answered by Anonymous · 0⤊ 0⤋