11, 22, 33, 44, 55, 66, 77, 88, 99, 110, 121, 132 . . .
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Since both 11 and 13 are prime numbers, the LCM of these 2 number is 11 * 13 = 143. All multiples of 143 are multiples of 11 and 13 as well
All of the odd numbers between 11 and 99 inclusive are two digit numbers that are not multiples of 2. There are 45 of them.
The common multiples of 3 and 11 are the infinite set starting 33, 99, 99, 132, 165, 198, 231, 264, 297, 330, and so on. In fact 33n where n is a natural number greater than or equal to 3 will all be common multiples of both numbers.
The first 8 multiples of 11 are just the first 8 whole numbers in our numerical system multiplied by 11. 11, 22, 33, 44, 55, 66, 77, and 88.
They are 33 and any of its multiples