Jawab:

The common multiples of 20 and 30 are:

• 60
• 120
• 180

So there are 3 common multiples between 20 and 30

Penjelasan dengan langkah-langkah:

Here are the multiples of 20: 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, 300, ...

And here are the multiples of 30: 30, 60, 90, 120, 150, 180, 210, 240, 270, 300, ...

To find the common multiples, we look for the numbers that appear in both lists. In this case, the common multiples are:

• 60 (appears in both lists)
• 120 (20 x 6 = 120, and 30 x 4 = 120)
• 180 (20 x 9 = 180, and 30 x 6 = 180)

So the three common multiples of 20 and 30 are 60, 120, and 180.