3 of them.
They are: 70, 77, 84.
The multiples of five between sixty and ninety (inclusive) are 60, 65, 70, 75, 80, 85 and 90.
There are 10 multiples of 10 between 1 and 100: 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100.
50, 60, 70, 80, 90
You need at least two numbers to find an LCM. The multiples of 9 between 70 and 105 are 72, 81, 90 and 99.
70 and 90
65, 70, 75, 80, 85.
50, 60, 70, 80, 90, and 100.
65, 70, 75, 80, 85, 90 and 95.
10, 20, 30, 40, 50, 60, 70, 80, 90, 100
There is only one. It is 70.
They are: 20, 30, 40, 50, 60, 70, 80, 90, 100.