# Find three consecutive numbers whose sum is 138 by writing and solving an equation

The sum of three consecutive even integers is The triangular numbers are a set of numbers that result from adding the first n consecutive natural numbers.

Our fourth look takes an algebraic approach to deriving the formula. On the right side of the equation, we see the sum of the first n natural numbers multiplied by a factor of 2, and a term of 1 repeated n times.

The sum of two consecutive odd integers is The lengths of the shelves in inches should be 6, 8, 10 and Note that the first sum is equal to the second sum minus the term. How to solve algebra word problems that involve consecutive even integers? If we imagine stacking these two representations on top of each other and adding up the corresponding columns, the result will be as seen below: Please submit your feedback or enquiries via our Feedback page.

Although this essay in no way exhausts the potential ways to approach finding the sum of the first n natural numbers, it is a good start in showing the variety of ways that it can be shown and may also give some ideas for extension activities and related concepts associated with the problem.

In this essay, we will take a look at five such ways of deriving this formula. If we add each of these equations together, we will see that on the left side of the equation all the terms cancel with one another except for the first,and the last.

Show Step-by-step Solutions Example: Putting it all together gets us the result below: Consider the dot diagram below representing the sum of the first 4 triangular numbers. We can represent this algebraically as seen below. We welcome your feedback, comments and questions about this site or page.

How to represent the sum of even and odd consecutive integers algebraically? We then want to consider what would happen if we took two of this diagram and put them together forming a square. However, we should remember that this was found from taking the sum of the first n natural numbers TWICE, and we should divide the previous total in half to gain our desired result.

Maggie Hendricks A very common and popular problem in secondary mathematics is that of finding the sum of the first n natural numbers. Find the value of the smaller integer. Which of the following is the largest integer?

Show Step-by-step Solutions Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. This can be algebraically manipulated to say that Since the above equation is true for n, it should also be true when we replace n with n-1, n-2, n-3, …, 2, 1.

The sum of two consecutive integers is To begin, we will look at the first few triangular numbers represented by the dot diagrams as shown below:Question Find three consecutive even numbers whose sum is 54 mi-centre.com write a "let statement": x= 1st cons.

even number x+2= 2nd cons. even number x+4= 3rd cons. even number Now re-write the problem. Consecutive Even Integer Problems. Related Topics: He plans to use it to make 4 shelves whose lengths are to be a series of consecutive even numbers.

How long should each shelf be in inches? Solution: 3. The sum of three consecutive even integers is Find the integers. Jun 01,  · So it's got to be approx.1 number above and below a 1/3rd of so / 3 = 46, try 45,46 and 47, sum 45, 46, 47 = where /3 = n, (n-1)+ n+ (n+1) [(/3)-1] + (/3) + [(/3)+1]is a solution to the mi-centre.com: Resolved.

The sum of 2 consecutive numbers is I need to find those numbers, but I'm not even sure how to set up the problem. and they just assume you understand that part and are having trouble with equation solving. (also, MInimum value of the sum of three numbers. 0. Find three consecutive numbers whose sum is by writing and solving an equation Get the answers you need, now!/5(5).

Finding the Sum of Consecutive Natural Numbers by: Maggie Hendricks A very common and popular problem in secondary mathematics is that of finding the sum of the first n natural numbers.

Find three consecutive numbers whose sum is 138 by writing and solving an equation
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