The multiples of five between sixty and ninety (inclusive) are 60, 65, 70, 75, 80, 85 and 90.
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lcm(2, 3, 5) = 30 → 2 digit common multiples are 30, 60, 90.
2 x 3 x 5 = 30 so that and 60
Since the lowest common multiple of 3 and 5 is 15, the common multiples of 3 and 5 are the multiples of 15: 30, 45, 60, 75, 90, etc...
90
There are 19 multiples of five that fall between 1 and 100: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95.