Q: Find the average of the first 20 multiples of 3?

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The only multiples of 2 are 1 and 2 because it's a prime number, but if you meant first 2 multiples of 20 then it's also 1 and 2.

The first 4 multiples of 10 are: 10, 20, 30, and 40.

15 & 20 have an infinite number of Common Multiples; the first three are 60, 120 and 180.

5 10 15 20

Multiples of what???For example, to get multiples of 20, just start with 20 and add 20 at a time: 20, 40, 60, ...

Related questions

-the first 10 multiples of 20 are 20,40,60,80,100,120,140,160,180, and 200. :)

The first four multiples of 20 are: 20 40 60 80

-15

The first 5 multiples of 4 and 20 are 20, 40, 60, 80, 100

They are 10 and 20

20 ,40,60,80,100

The first four multiples of five: 5, 10, 15, 20

20, 40, 60...

20,40,60,80,100,120,140,160,180,200

81162243324405486567648729810991107211531234131513961477155816391720

The only multiples of 2 are 1 and 2 because it's a prime number, but if you meant first 2 multiples of 20 then it's also 1 and 2.

The first 4 multiples of 10 are: 10, 20, 30, and 40.