The first three multiples of 235 are 235, 470 and 705. For them to be common, they need to be compared to another set of multiples.
The first three common multiples of 2, 3 and 5 are 30, 60 and 90.
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The first two common multiples of 235 is 5 and 47.
You can't have common multiples if they have nothing to be in common with however the first 3 multiples of 9 are 9,18 and 27 Think of just your times tables when finding out Multiples to find the first 5 multiples just count by 9's until you have said 5 numbers and Bingo
To find the common multiples of 2, 3, and 7, we first list the multiples of each number: Multiples of 2: 2, 4, 6, 8, 10, 12, ... Multiples of 3: 3, 6, 9, 12, 15, 18, ... Multiples of 7: 7, 14, 21, 28, 35, ... The first common multiple of 2, 3, and 7 is 6, as it is the smallest number that is a multiple of all three numbers. The second common multiple is 12, as it is the next number that is a multiple of all three numbers.
The first common multiple of 3 4 5 and 7 is 420.
The anser to that Q is 30.