Be observing the table, we can write the following conjecture:
When adding consecutive even numbers, starting from 2 to
.
Then the sum is equal to:
Then, the sum of the first 15 positive even numbers (which is the sum of 2 to 30) can be calculated with the previous conjecture by setting
:
The answer is 240.
When adding consecutive even numbers, starting from 2 to
Then the sum is equal to:
Then, the sum of the first 15 positive even numbers (which is the sum of 2 to 30) can be calculated with the previous conjecture by setting
The answer is 240.