Their HCF is 8
48, 96, 144, 192, 240, 288, 336 +48 . . .
One.
It is 280
40 and 63 have no common prime factors.
The smallest number that both 8 and 10 can go into is their least common multiple (LCM), which is the smallest multiple that both numbers share. The LCM of 8 and 10 is 40, as 8 x 5 = 40 and 10 x 4 = 40. Therefore, 40 is the number that both 8 and 10 can evenly divide into.
Either 1 or 40
40, 80, 120, 160, 200, 240 +40 . . .
Yes: 192/3 = 64
The greatest common factor of the numbers 40 and 44 would be 4. This the highest number that will go evenly into both numbers.
Eleven.
40, 80, 120, 160, 200 +40 . . .
1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 160, 192, 240, 320, 480, 960.