The sum of the numbers from 1 to n is given by:
What is the average of the first 30 positive integers?
Hi all, I'm guessing 15 but
How do you figure this problem out, that is:
what is the layout of the math reasoning?
(I'm trying to learn more about number properties/interrelations etc)
Studying for an exam for Monday... your help is appreciated
Here's another prob:
A is 1,000(1+2+ ...+100)
B is 2,000(1+2+ ...+100)
B-A would be 1,000(1+2+ ...+100) , right?
Then how can you know without doing the summing, what
1,000(1+2+ ...+100) is?
Is there a "trick" to the number relationships?
One thing, we know that 100+99 is 199 almost 200 so 1,000*200 is 200,000 so the answer would have to be more than that.
is this the only way to "figure " this out? or are there other ways?