BswimpereD3oughenej BswimpereD3oughenej

30-11-2016
Mathematics

contestada

Please help D:

What conjecture can you make about the sum of the first 10 positive even numbers?

(1 point)
The sum is 9 · 10.
The sum is 10 · 10.
The sum is 11 · 12.
The sum is 10 · 11.

Respuesta :

JcAlmighty JcAlmighty

05-12-2016

The answer is The sum is 10 · 11.

The first 10 positive even numbers are:
2, 4, 6, 8, 10, 12, 14, 16, 18, 20

Their sum is:
2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 = 110

Now, let's present it as two factors:
110 = 11 * 10

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