21, 42, 63, 84, 105.
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The first five multiples of 21 are: 21, 42, 63, 84, 105.
Example: 5 and 7 List the multiples of 5. 5, 10, 15, 20, 25, 30, 35, 40... List the multiples of 7. 7, 14, 21, 28, 35, 42... The LCM is the first number that appears on both lists.
The first 5 multiples of seventeen are 17,34,51,68, and 85.
The first 5 multiples of 1 are: 1, 2, 3, 4, and 5.
The first two common multiples of 235 is 5 and 47.