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.
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.
40, 80, 120, 160, 200 +40 . . .