Video Series: How to Solve Number Problems Mentally

Last year, I have written a tutorial on How to Solve Number Problems Mentally. This article has been turned into a math tutorial video in Youtube under the Sipnayan channel. Sipnayan is a Youtube Channel which contains math tutorial videos in Tagalog.

Embedded below are the three videos in the series.

Part 1 solves the following problem:

One number is 3 more than the other. Their sum is 45. What are the numbers?

Part 2 solves the following problem:

The sum of two numbers is 53. One number is 7 less than the other. What are the numbers?

Part 3 solves the following problem:

One number is twice the other number. Their sum is 45. What are the numbers?

Enjoy learning. If you have questions or comments, please type them below.

Video Series: How to Solve Consecutive Number Problems

PH Civil Service Review partners with the Sipnayan Youtube Channel in order to teach the basic concepts of mathematics easily. These tutorials are explained in mixed Tagalog and English, so viewers would be able to understand more. Below is one of the video series in the Sipnayan Youtube channel: a series of tutorials on how to solve consecutive number problems.

Part 1

The first video shown below discusses the definition of consecutive numbers. It also explains the difference of consecutive numbers, consecutive even numbers, and consecutive odd numbers. It discusses how to represent consecutive numbers algebraically and gives two sample problems.

Part 2 (click here to watch video), discusses in details two more examples. The first is four consecutive numbers with a sum of 70 and the third one is 3 consecutive numbers with a sum of 51.

Part 3 (click here to watch video) discusses two consecutive number problems describing their terms.

Aside from these videos, PH Civil Service Review has also a tutorial series on “The Solving Consecutive Number Problems Series” which discusses more examples in details. You can also subscribe to the Sipnayan Youtube Channel to be updated to the latest videos.

How to Solve Consecutive Number Problems Part 1

This is the first of the Solving Consecutive Number Series, a series of post discussing word problems about consecutive numbers.

Consecutive numbers are numbers that follow each other in order. In number problems in Algebra, consecutive numbers usually have difference 1 or 2. Below are the types of consecutive numbers,

consecutive numbers – 5, 6, 7, 8, …

consecutive even numbers – 16, 18, 20, 22…

consecutive odd numbers – 3, 5, 7, 8, …

The symbol … means that the list may be continued.

Notice that consecutive numbers always increase by 1 in each term. If we make 5 as point of reference, then, we can write the numbers above as

5, 5 + 1, 5 + 2, 5 + 3.

That means that if our first number is x, then the list above can be written as

x, (x + 1), (x + 2), (x + 3)

and so on.  » Read more

Solving Equations Tutorial Videos

Solving Equations is one of the most important concepts that you should learn in order to pass the Civil Service Examinations. Equations are used as they are and they are also used in solving Word Problems. Having a good grasp in solving equations can give you good advantages.

We have already discussed solving equations, but below are the supplement videos if you are not fond of reading.

Part 1 – Solving equations ofr the form ax = b, x/a = b, ax + b = c. » Read more

8 Tagalog Video Tutorials on Solving Age Problems

If you are not patient with reading long articles and you have a fast internet, you might want to check out the Solving Age Problems Video Series (see list below). These videos series has 8 videos which contain detailed explanations and solutions to various age problems discussed in the Ph Civil Service Review’s Solving Age Problems Series.

The video series starts with solving simple age problems mentally and gets more complicated as you go on. The last part of the series discusses how to solve age problems involving fractions.  The first video is shown below. » Read more

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