September 2012 - Page 4 of 10 - Math and Multimedia

Math Word Problems: Solving Number Problems Part 3

September 22, 2012 GB High School Algebra, High School Mathematics, Problem Solving and Proofs

This is the third part of the Solving Number Problems Series. The first part can be read here and the second part can be read here. In this post I will continue worked examples using problems which are slightly more complicated than the problems in the previous two parts. Without further ado, lets start with the seventh problem in the series.

PROBLEM 7

Twice a number added to $18$ is $5$ times that number. What is the number?

Solution

In the two previous posts, we have learned that if $n$ is a number, then twice that number is $2n$ . So, twice a number added to $5$ is represented by $2n + 5$ . Now, that number, the $2n + 5$ is five times that number of $5n$ . So, we can now set up the equation

$2n + 18 = 5n$ .

If we solve for $n$ , we have $n = 6$ . » Read more

5 comments number problems, sample number problems, sample of word problems, word problems, word problems with solutions

GeoGebra Institute of Manila’s New Site

September 21, 2012 GB GeoGebra

The website of the GeoGebra Institute of Metro Manila (GIMM) has been transferred here: http://geogebrainstituteph.blogspot.com/

We are still waiting for our official URL. Starting October 2012, we will be accepting post contributions from GeoGebra users in the Philippines. If you are interested, please contact me or email me at nismedmultimedia@gmail.com.

One comment GeoGebra, geogebra institute, geogebra institute of manila

What if your paycheck…

September 20, 2012 GB Fun and Jokes, Funny Mathematics

… looks like this? What would you do?

If I were you, I would immediately inform my employer that I can’t accept this paycheck since $e^{i\pi} = -1$ and $\sum_{n=1}^{\infty}\frac{1}{2^n}=1$ (Why?). This is only worth 0.002 dollars.

Leave a comment funny check, funny math, funny paycheck

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