Greatest common factor:
79 and 80
36 and 84
12,30,126
Least common multiple
4,2,7
5,8,12
2007-07-13 22:18:42 · 5 answers · asked by Jeniv the Brit 7 in Science & Mathematics ➔ Mathematics
Greatest common factor:
79 and 80 = 1
bec they have no other similar factors except for 1
36 and 84
36 = 3*2*3*2
84 = 3*2*2*2*2*2
GCF: 3*2*2 or 12
12,30,126
12=3*2*2
30=3*5*2
126=3*7*3*2
GCF: 3*2 = 6
Least common multiple
4,2,7
first get all their common factors, then disregard their common no and multiply the rest with the factored out no
2=2*1
4=2*2
7=7*1
LCM: 2*2*7=28
5,8,12
LCM = 2*2*5*2*3 = 120
2007-07-13 22:33:29 · answer #1 · answered by >_< 2 · 0⤊ 0⤋
GCM of 79 and 80=1
Reason:79 is a prime number.
GCM of 36 and 84=12
36/12=3 and 84/12=7
LCM of 4,2,7=2*2*7=56
LCM of 5,8,12=4*5*2 *3=120
2007-07-13 22:54:24 · answer #2 · answered by Anonymous · 0⤊ 0⤋
80-79 = 1 so GCF is 1.
84-36 = 48
48-36=12
36-12=24
24-12=12
12-12=0 so GCF = 12
126-30 is 96
96-30-30-30 = 6 so GCF=6
LCM 4,2,7 is 2*2*7=28
LCM of 5, 8, 12 is 2*2*2*3*5 = 120
.
2007-07-13 22:31:58 · answer #3 · answered by tsr21 6 · 1⤊ 0⤋
GCF
for 79 and 80 is 1
for 36 and 84 is 12
for 12,30,126 is 6
LCM
for 4,2,7 is 28
for 5,8,12 is 120
2007-07-13 22:42:29 · answer #4 · answered by Daniela 2 · 0⤊ 0⤋
GCF 1)1
2)12
3)6
LCM 1)28
2)120
2007-07-13 22:32:51 · answer #5 · answered by bhuvan 4 · 0⤊ 0⤋