2007-10-17 13:10:09 · 3 answers · asked by leer 2 in Science & Mathematics ➔ Mathematics
Prime factors of 18:
2 x 3 x 3
Prime factors of 24:
2 x 2 x 2 x 3
So you need three 2s and two 3s to cover them:
2 x 2 x 2 x 3 x 3 = 72
This is the lowest common *multiple*
Double-check:
Multiples of 18:
18, 36, 54, 72, 90, 108...
Multiples of 24:
24, 48, 72, 96, 120, 144...
The first (lowest) multiple that they have in common is 72.
LCM(18, 24) = 72
2007-10-17 13:15:18 · answer #1 · answered by Puzzling 7 · 0⤊ 0⤋
The LCM of 18 and 24
Multiples of 18 are 18,36,54,72,90,108,144.....
Multiples of 24 are 24,48,72,96,120,144.....
Common Multiples are 72 and 144
The LCM of 18 and 24 is 72
2007-10-17 20:20:26 · answer #2 · answered by Jen J 2 · 0⤊ 0⤋
72
2007-10-17 20:17:50 · answer #3 · answered by Anonymous · 0⤊ 0⤋