1,1.5,2,2.25,3,4,4.5,6,9
there's 9.....because it's a perfect square, it's normal 5 pairs of multiples(to make your required 10), is reduced to 4 1/2. One of its multiples is used with itself to form 9(3). Since two different integers cannot be squared and still equal the same number, you cannot reach 10. 9 is as close as you can get.
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9,18,27,36,45,54,63,72,81,90
The first six multiples of 3 are 3, 6, 9, 12, 15, and 18. They are the products of 3 and the nonzero integers 1, 2, 3, 4, 5, and 6.
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108
The first two multiples are 9 and 8.
The first 5 multiples of 9 are 9, 18, 27, 36, and 45. For them to be common, they need to be compared to another set of multiples.