answersLogoWhite

0


Best Answer

840

There are a several ways to approach this problem, the most staightforward being to to simply add all of them up.

Another is to let X be the sum of all of the even numbers from 12 through 58.

X=12+14+16+...+54+56+58

But X also can be expressed as follows:

X=58+56+54+...+16+14+12

If you add these two equations term by term, you'll notice that each term sums to 70 (12+58, 14+56, 16+54, etc.). You should also note that there are 24 70's when you add them up (i.e., there are 24 even numbers from 12 through 58. Adding the two equations above, you get:

2X=70+70+70+...+70+70+70=70*24

Dividing both side by two, you get your result: X=70*24/2 = 840.

User Avatar

Wiki User

15y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Find the sum of all the even numbers from 12 through 58?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

What is the sum of all even numbers of 2-98?

100


Program to print all the even numbers of an array in visual basic?

find even number in array


Are composite numbers even numbers?

Not all composite numbers are even, but all even numbers except 2 are composite.


Why is it difficult impossible to find even prime numbers?

It is difficult to find even prime numbers because 2 is the only one. All the rest of the even numbers are divisible by 2, so they have at least one factor in addition to 1 and the number itself.


What are the numbers divisible by 2?

All of the even numbers are divisible by 2.


Find the sum of all odd and even numbers?

This is impossible because there is an infinite number of them.


What happens to the median when you come up with two answer?

when you have an even amount of numbers while trying to find the median, you first find the two numbers that are at the median and then take all the numbers between them and find the median of that. if that amount of digits is also even, then you must have a decimal median.


Is all even numbers composite?

no all even numbers except 2


What is the 2 factors of even numbers?

it is the integers of even numbers which divide all the even numbers


What are divisible by 2?

All even numbers are divisible by 2.


Find the sum of the first 50 even numbers what is the sum?

of all the things i got is 2550


How do you find the LCM of 3 numbers through the common division method?

Find the LCM of the first two numbers and then find the LCM of that number and the third one. That answer will be the LCM of all three.