500 New SAT Math Problems
Just 19.99 on Amazon
Hi everyone! The latest edition of 500 New SAT Math Problems is now available in paperback from Amazon. This edition just has been modified from the previous edition to account for the changes on the Digital SAT.
The paperback is now on sale on Amazon for only $19.99. Note that once the sale ends (by the end of today), the price of this book will go up to $42.99.
The promotion has ended. Thanks to everyone who participated. The book is now available at its regular price here: 500 New SAT Math Problems
If you have any questions, feel free to contact me at steve@SATPrepGet800.com
Thank you all for your continued support!
A Trick For Free Two Day Shipping
I would like to finish this post with a little trick you can use to get free 2 day shipping on any of the books you decide to purchase without making any additional purchases. If you have never used Amazon Prime you can sign up for a free month using the following link.
Sign Up For Amazon Prime For Free
If you have already had a free trial of Amazon Prime you can simply open up a new Amazon account to get a new free trial. It just takes a few minutes! You will need to use a different email address than the one you usually use.
This next part is very important! After you finish your transaction, go to your Account, select “Manage my prime membership,” and turn off the recurring billing. This way in a month’s time Amazon will not start charging you for the service.
After shutting off the recurring billing you will still continue to receive the benefit of free 2 day shipping for one month. This means that as long as you use this new Amazon account for your purchases you can do all of your shopping on Amazon for the next month without having to worry about placing minimum orders to get free shipping.
Just be aware that certain products from outside sellers do not always qualify for free shipping, so please always check over your bill carefully before you check out.
Well I hope you decide to take advantage of this very special offer, or at the very least I hope you will benefit from my Amazon “free 2 day shipping trick.” Here is the link one more time:
Sign Up For Amazon Prime For Free
If you think your friends might be interested in this special offer, please share it with them on Facebook:
Thank you all for your continued support!
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Arithmetic Series
Hello everyone.
Last week I uploaded an ACT prep video to my YouTube channel on arithmetic sequences. I suggest that you rewatch that video before watching the new one that I have uploaded today. The video on arithmetic sequences can be found here: ACT Prep – Arithmetic Sequences
Today I have uploaded a video to my YouTube channel on arithmetic series. You can visit the YouTube page here: ACT Prep – Arithmetic Series
For your convenience I have also embedded this video below:
If you liked this video, please share it with your Facebook friends:
Arithmetic Sequences
Hello everyone.
I have already written several blog posts on how to solve ACT math problems involving arithmetic sequences. Here are links to those articles:
Arithmetic Sequences and Linear Equations
The Arithmetic Sequence Formula
Today I have uploaded a video to my YouTube channel that provides the same information. You can visit the YouTube page here: ACT Prep – Arithmetic Sequences
For your convenience I have also embedded this video below:
If you liked this video, please share it with your Facebook friends:
Until next time…
Hello everyone.
I have already spoken about solving algebraic equations both informally and formally in the past. The original article is here: Informal and Formal Algebra
Today I have uploaded a video to my YouTube channel that shows how to apply the strategy of “picking numbers” to ACT math problems. You can visit the YouTube page here: ACT Prep – Informal and Formal Algebra
For your convenience I have also embedded this video below:
If you liked this video, please share it with your Facebook friends:
Until next time…
Hello everyone.
I have already written several blog posts on how to solve counting problems on the SAT. Here are links to those articles:
Listing and the Counting Principle
Today I have uploaded a video to my YouTube channel that shows how to solve counting problems that appear on the ACT. You can visit the YouTube page here: ACT Prep – Counting Problems
For your convenience I have also embedded this video below:
If you liked this video, please share it with your Facebook friends:
Until next time…
The Contrapositive
A statement of the form “if p, then q” is known as a conditional statement. An example of such a statement is “If you are a cat, then you have fur.” Another common way to say this is “All cats have fur.”
There are 3 other statements that often come up in association with a conditional statement. Let’s use the example above to illustrate.
Conditional: If you are a cat, then you have fur.
Converse: If you have fur, then you are a cat.
Inverse: If you are not a cat, then you do not have fur.
Contrapositive: If you do not have fur, then you are not a cat.
The most important thing to know for the SAT is that the contrapositive is logically equivalent to the original conditional statement! The converse and inverse are not.
For example, suppose the conditional statement “All cats have fur” is true. You may want to rewrite this as “If you are a cat, then you have fur.” It follows that “If you do not have fur, then you are not a cat” is also true.
In particular, if you are given the statement “Skittles does not have fur,” you can infer “Skittles is not a cat.”
Note that neither the converse nor the inverse is logically equivalent to the original conditional statement, but they are equivalent to each other.
Example 1
- If the statement above is true, which of the following statements must also be true?(A) If John cannot ski, then he is not Jim’s friend
(B) If Jeff can ski, then he is not Jim’s friend.
(C) If Joseph can ski, then he is Jim’s friend.
(D) If James is Jim’s friend, then he cannot ski.
(E) If Jordan is not Jim’s friend, then he cannot ski.
Solution: The given statement can be written in conditional form as “If you are Jim’s friend, then you can ski.” The contrapositive of this statement is “If you cannot ski, then you are not Jim’s friend. Replacing “you” with “John” gives the correct answer as choice (A).
Example 2
If the statement above is true, which of the following statements must also be true?
(A) If a beverage is listed in menu B, it is also in menu A.
(B) If a beverage is not listed in menu A, it is not listed in menu B.
(C) If a beverage is not listed in menu B, it is not listed in menu A.
(D) If a beverage is not listed in menu B, it is in menu A.
(E) If a beverage is listed in menu B, it is not listed in menu A.
Solution: Simply observe that the statement in choice (C) is the contrapositive of the given statement. So the answer is choice (C).
Conclusion
If you understand how to identify the contrapositive of a conditional statement, then you will be able to easily get most logic questions correct that appear on the SAT. There are a couple of other types of logic questions that can appear on the SAT. I will address those in a future blog post.
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Hello everyone.
The past two weeks I gave you ACT prep videos on basic trigonometry and trigonometric identities. You can see those videos on YouTube here:
ACT Prep – Trigonometry of the Right Triangle
ACT Prep – Trigonometric Identities
Today I have uploaded a video to my YouTube channel that shows how to solve ACT math problems that require the laws of signs and cosines. You can visit the YouTube page here: ACT Prep – Laws of Sines and Cosines
For your convenience I have also embedded this video below:
If you liked this video, please share it with your Facebook friends:
Until next time…
Hello everyone.
Last week I gave you an ACT video on basic trigonometry. You can see that video on YouTube here: ACT Prep – Trigonometry of the Right Triangle
Today I have uploaded a video to my YouTube channel that shows how to solve ACT math problems involving the basic trigonometric identities. You can visit the YouTube page here: ACT Prep – Trigonometric Identities
For your convenience I have also embedded this video below:
If you liked this video, please share it with your Facebook friends:
Until next time…
Hello everyone.
I have already spoken about the basic trigonometry of the right triangle. Here are the articles: Trigonometry of the Right Triangle Part 1 and Part 2
Today I have uploaded a video to my YouTube channel that shows how to solve Trigonometry problems on the ACT. You can visit the YouTube page here: ACT Prep – Trigonometry of the Right Triangle
For your convenience I have also embedded this video below:
If you liked this video, please share it with your Facebook friends:
Until next time…
Hello everyone.
I have already spoken about the strategy of “picking numbers” several times, mostly relating to SAT math. For an example you can take a look at the following article: Picking Numbers in SAT Math Problems
Today I have uploaded a video to my YouTube channel that shows how to apply the strategy of “picking numbers” to ACT math problems. You can visit the YouTube page here: ACT Prep – Picking Numbers
For your convenience I have also embedded this video below:
If you liked this video, please share it with your Facebook friends:
Until next time…
320 AP Calculus AB Problems
Today I would like to announce the release of my new book: 320 AP Calculus AP Problems arranged by Topic and Difficulty Level.
The paperback is now on sale on Amazon for only $5.41.
This sale may last for only a few hours, and once the sale ends the price will go up to $34.99. Amazon will automatically raise the price once a predetermined number of copies has been sold. If you want to take advantage of the sale price I strongly recommend you purchase the book now.
The discount is ended. Thank you to everyone who participated in this sale. I can still offer the promotions described below.
Click the following link to get to the book’s Amazon page: 320 AP Calculus AB Problems
Since the promotion ended so quickly I would like to double my previous offer and give you an additional two books for FREE as downloadable PDF files. You can choose ANY of my other books. So if you would like a different book, go ahead and purchase this one (as soon as it is available), forward me your Amazon confirmation email and let me know which of my books you would like for free. You will be provided with a link to download your additional free books. This offer is available until the end of today (November 11, 2014).
Take a look at my product page to see all of my books: Get 800 Product Page
You should also be aware that the following promotion is still available: if you buy any 2 of my books in paperback, you get all 6 of the following SAT math prep books for free.
A Trick For Free Two Day Shipping
I would like to finish this post with a little trick you can use to get free 2 day shipping on any of the books you decide to purchase without making any additional purchases. If you have never used Amazon Prime you can sign up for a free month using the following link.
Sign Up For Amazon Prime For Free
If you have already had a free trial of Amazon Prime you can simply open up a new Amazon account to get a new free trial. It just takes a few minutes! You will need to use a different email address than the one you usually use.
This next part is very important! After you finish your transaction, go to your Account, select “Manage my prime membership,” and turn off the recurring billing. This way in a month’s time Amazon will not start charging you for the service.
After shutting off the recurring billing you will still continue to receive the benefit of free 2 day shipping for one month. This means that as long as you use this new Amazon account for your purchases you can do all of your shopping on Amazon for the next month without having to worry about placing minimum orders to get free shipping.
Just be aware that certain products from outside sellers do not always qualify for free shipping, so please always check over your bill carefully before you check out.
Well I hope you decide to take advantage of this very special offer, or at the very least I hope you will benefit from my Amazon “free 2 day shipping trick.” Here is the link one more time:
Sign Up For Amazon Prime For Free
If you think your friends might be interested in this special offer, please share it with them on Facebook:
Thank you all for your continued support!