41, 82, 123, 164, 205
The multiples of 57 are 57*2, 57*3, 57*4, 57*5 and so on. The first ten are 114, 171, 228, 285, 342, 399, 456, 513, 570, and 627. The multiples of 123 are 123*2, 123*3, 123*4, 123*5, and so on. The first ten are 246, 369, 492, 615, 738, 861, 984, 1107, 1230, and 1353. Numbers that are multiples of both appear in both lists, for example 7011 and 14022. (The lists above are not long enough to show the numbers that appear in both lists; they would have to be extended).
The first 6 multiples of 5 are: 5, 10, 15, 20, 25, and 30.
-15
7,14,21,28,35
41, 82, 123, 164, 205
They are 123, 246, 369, 492, and 615.
123, 246, 369, 492, 615, 738.
The multiples of 57 are 57*2, 57*3, 57*4, 57*5 and so on. The first ten are 114, 171, 228, 285, 342, 399, 456, 513, 570, and 627. The multiples of 123 are 123*2, 123*3, 123*4, 123*5, and so on. The first ten are 246, 369, 492, 615, 738, 861, 984, 1107, 1230, and 1353. Numbers that are multiples of both appear in both lists, for example 7011 and 14022. (The lists above are not long enough to show the numbers that appear in both lists; they would have to be extended).
The first ten positive integer multiples of 123 are: 1 x 123 = 123 2 x 123 = 246 3 x 123 = 369 4 x 123 = 492 5 x 123 = 615 6 x 123 = 738 7 x 123 = 861 8 x 123 = 984 9 x 123 = 1107 10 x 123 = 1230
41, 82, 123, 164, 205
They are the first three multiples of LCM(5, 9), that is, the first three multiples of 45.
The first 5 common multiples are the first 5 multiples of their lowest common multiple (LCM) LCM(9, 10) = 90 → first 5 common multiples are 90, 180, 270, 360, 450.
To get multiples of 123, just calculate: 123 x 0 123 x 1 123 x 2 etc. Also: 123 x (-1) 123 x (-2) etc.
The first four multiples of five: 5, 10, 15, 20
The first 6 multiples of 5 are: 5, 10, 15, 20, 25, and 30.
154, 308, 462, 616, and 770 are the first 5 multiples of 154.