Mathematics

Itchy

14 October, 07:07

I don't how I would do this exactly ...

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

2 = 2 = 1 times 2

2 + 4 = 6 = 2 times 3

2 + 4 + 6 = 12 = 3 times 4

2 + 4 + 6 + 8 = 20 = 4 times 5

2 + 4 + 6 + 8 + 10 = 30 = 5 times 6

Choices:

o The sum is 9 times 10

o The sum is 10 times 10

o The sum is 11 time 12

o The sum is 10 times 11