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Anonymous
1 is a one-digit number that is a factor of both 8 and 9, but there is no one-digit number that has both 8 and 9 as factors.
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45, 90, 135, 180, 225, 270 and so on. Just keep adding 45.
The LCM of 8 and 9 is 72
72
360
The least common multiple of the numbers 9 and 5 is 45.
45
36