The two-digit multiples of nine are 18, 27, 36, 45, 54, 63, 72, 81, 90, 99.
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To find the multiples of 9 up to 9000, you can use the formula: (9 \times n), where (n) is a positive integer. The first few multiples of 9 are 9, 18, 27, 36, and so on. To find the multiples of 9 up to 9000, divide 9000 by 9, which equals 1000. Therefore, the multiples of 9 up to 9000 are all the multiples of 9 from 9 to 9000, inclusive.
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.
The common multiples of 9 and 11 are 99, 198, 297 and so on.
45 and 54 are the multiples of 9 between 40 and 60
The first two multiples are 9 and 8.