what is the least common multiple of 12, 20,and 35
2007-12-14 11:19:58 · 14 answers · asked by Flyyasever 3 in Science & Mathematics ➔ Mathematics
OK
12 = 2x2x3
20 = 2x2x5
35 = 5x7
So the least common is 1 or 2x2x3x5x7 = 420
420 /12 = 35
420 /20 = 21
420 /35 = 12
Hope that helps.
2007-12-14 11:26:37 · answer #1 · answered by pyz01 7 · 0⤊ 0⤋
1
2007-12-14 12:52:58 · answer #2 · answered by J 6 · 0⤊ 0⤋
its 420
12 x 35 x 20
2007-12-14 11:26:32 · answer #3 · answered by Anonymous · 0⤊ 0⤋
To find the least common multiple, you need to fractionize these numbers first. For example;
12 = 4*3
20 = 4*5
35 = 5*7
So the least common multiple = 4*3*5*7 = 420
2007-12-14 11:23:55 · answer #4 · answered by DaH 2 · 1⤊ 0⤋
We need to do these two at a time and break down to prime factors.
12 = 2x2x3
20 = 2x2x5
LCM of these is 2x2x3x5 = 60
Now we need to find the least common multiple of 60 and 35.
We already did 60.
35 = 7x5.
So, the LCM of 35 and 60 is
2x2x3x5x7 = 420
2007-12-14 11:28:52 · answer #5 · answered by stanschim 7 · 0⤊ 0⤋
The LCM of 12, 20, and 35 is 420 I think
The GCF is 1.
2007-12-14 11:22:37 · answer #6 · answered by Kevin 2 · 1⤊ 0⤋
Key: Do the LCM 2 numbers at a time.
The LCM of a and b is ab/GCD(a,b).
So LCM(12.20) = 12*20/4 = 60
LCM(60,35) = 60*35/5 = 420.
2007-12-14 14:18:46 · answer #7 · answered by steiner1745 7 · 0⤊ 0⤋
12=2x2x3
20=2x2x5
35=5x7
2x2x3x5x7=420=lcm
1=gcf
2007-12-14 12:27:22 · answer #8 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
INCORRECT!!!!
its 420.
the other guy did the gcf which is 1
2007-12-14 11:24:45 · answer #9 · answered by Plain Silly 4 · 1⤊ 0⤋
12= 2^2*3
20=2^2*5
35= 5*7
lcm=1
2007-12-14 11:22:26 · answer #10 · answered by Omega 3 · 0⤊ 4⤋