Question

2
2+4
2+4
2+4+6
2+4+6+8
2+4+6+8+10
Look at the table. Make a conjecture about the sum of the first 30 positive even numbers.

The sum is 29 × 30.
The sum is 30 × 31.
The sum is 30 × 30.
The sum is 31 × 32.

Answer 1

1: 2 = 2*1
2: 2 + 4 = 6 = 3*2
3: 2 + 4 + 6 = 12 = 4* 3
...
30: 31*30

Answer 2

thank you :)

Answer 3

no problem