2006-11-18 06:44:03 · 12 answers · asked by reesespieces60202 2 in Science & Mathematics ➔ Mathematics
First, factor each number into its "prime form":
12 = 2 * 2 * 3
20 = 2 * 2 * 5
35 = 5 * 7
Take the numbers of the first one: 2 * 2 * 3. Now, if these numbers are in any of the other numbers, cross them out. You should have crossed out the "2 * 2" in the 20's numbers. Next, move on to the 20's primes. The two 2's are already crossed out, leaving the number 5. Add this to your list of numbers (2 * 2 * 3 * 5), and cross out any fives in the remaining numbers (35 in this example). Moving on, in the 35's prime, the only number left is 7. Add this to your list of numbers, and multiply for your answer:
2 * 2 * 3 * 5 * 7 = 420
2006-11-18 06:57:33 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The LCM is 420
2006-11-18 13:48:57 · answer #2 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 0⤋
lcm of 12=2*2*3
lcm of 20=2*2*5
lcm of 35=5*7
total lcm = 2*2*3*5*7=420
2006-11-18 06:58:57 · answer #3 · answered by nabeel h 2 · 0⤊ 0⤋
The LCM for 36 and 42 would be 252
2016-05-22 01:15:24 · answer #4 · answered by Anonymous · 0⤊ 0⤋
12 20 35
2 6 5 4 5 7
2 3 2 2 prime factors: 5,7
prime factors: 2,2,3 prime factors: 2,2,5
LCM = 2x2x3x5x7 = 420
2006-11-18 06:57:31 · answer #5 · answered by nanabanana 2 · 0⤊ 0⤋
420
2006-11-18 10:26:04 · answer #6 · answered by pamela 1 · 0⤊ 0⤋
420
2006-11-18 07:48:49 · answer #7 · answered by Anonymous · 0⤊ 0⤋
420
2006-11-18 06:56:57 · answer #8 · answered by Anonymous · 0⤊ 0⤋
420
2006-11-18 06:49:20 · answer #9 · answered by ksdances@pacbell.net 1 · 0⤊ 0⤋
420
2006-11-18 06:46:37 · answer #10 · answered by raj 7 · 0⤊ 1⤋