The factors of 24 are 1, 2, 3, 4, 6, 8, 12, 24 The factors of 63 are 1, 3, 7, 9, 21, 63 The largest number that goes into both 24 and 63 is 3. So the GCF of 24 and 63 is 3
2*9=18 7*9=63 9 will go into both 18 and 63
Seven goes into both 63 and 77
63
They are 1 and 3
6,300
24 + 63 = 87
63-24 = 39
315
40 and 63 have no common prime factors.
The LCM of 63 and 24 is 504.
90