Your Garage botysf16 Amazon Fashion Learn more Discover it PME Fire TV Stick Subscribe & Save Patriotic Picks Shop-by-Room Amazon Cash Back Offer AllOrNothingS1 AllOrNothingS1 AllOrNothingS1  Amazon Echo  Echo Dot  Amazon Tap  Echo Dot  Amazon Tap  Amazon Echo Starting at $49.99 All-New Kindle Oasis AutoRip in CDs & Vinyl Segway miniPro
Customer Review

14 of 19 people found the following review helpful
3.0 out of 5 stars Would be excellent if exercises were not "worthless"., October 14, 2008
By 
Verified Purchase(What's this?)
This review is from: The Magic of Numbers (Paperback)
This book is VERY readable -- and easily approachable -- BUT, suffers from a major defect for the SELF-LEARNER. There are *tons* of exercises that are recommended -- which would be great except doing the exercises is a complete waste of time -- you don't know if you got the exercise right or wrong! Yup. Ok, Now you do it: 1. what's 2^5 mod 11?, 2. 2^17 mod 23?....etc? Nice BUT if you do the exercises, you don't know if you got the right answer or not, so its a waste of time.
Worse -- the authors emphasize the need to do the exercises -- but if you don't know if you did them right or wrong, what's the point? There are a fair number of examples that do give answers, but these are about 1/5th - 1/6th the problems and the answers are given in the text of the problem. So while you know the answer, you can't really do the example, then see if you got the right answer -- because it's also there in front of you.
Having an answer key -- even if it was for every even or odd exercise would be helpful. Non-answered questions could be for those classes where the teacher doesn't trust the student to learn, but just copy answers, but if that's the case, why bother taking a class? Just copying answers doesn't help much in the real world nor on exams (which one would presumably have in a classroom setting).

But I bought this book for educational/recreational reading (just like some people like to participate in sports or go to a gym to exercise a body, many find mental exercise equally valuable for one's "head").

I would NOT recommend *against* the book, but it may go slowly, as the paucity answered problems make for slower going in terms of comprehension and retention (I find I more often have to reread prior chapter I understood, but didn't get enough practice to retain in order to progress onto more complex subjects).

For self-learning, FEEDBACK is required -- no feedback, then no learning if you are doing it right or wrong, but the format, typesetting, and conversational style on this book make it very readable. Just wish they had the answers (or at least odd numbered answers in the back).
Help other customers find the most helpful reviews 
Was this review helpful to you? Yes No

Be the first person to comment on this review.

[Add comment]
Post a comment
To insert a product link use the format: [[ASIN:ASIN product-title]] (What's this?)
Amazon will display this name with all your submissions, including reviews and discussion posts. (Learn more)
Name:
Badge:
This badge will be assigned to you and will appear along with your name.
There was an error. Please try again.
Please see the full guidelines here.

Official Comment

As a representative of this product you can post one Official Comment on this review. It will appear immediately below the review wherever it is displayed.   Learn more
The following name and badge will be shown with this comment:
 (edit name)
After clicking the Post button you will be asked to create your public name, which will be shown with all your contributions.

Is this your product?

If you are the author, artist, manufacturer or an official representative of this product, you can post an Official Comment on this review. It will appear immediately below the review wherever it is displayed.  Learn more
Otherwise, you can still post a regular comment on this review.

Is this your product?

If you are the author, artist, manufacturer or an official representative of this product, you can post an Official Comment on this review. It will appear immediately below the review wherever it is displayed.   Learn more
 
System timed out

We were unable to verify whether you represent the product. Please try again later, or retry now. Otherwise you can post a regular comment.

Since you previously posted an Official Comment, this comment will appear in the comment section below. You also have the option to edit your Official Comment.   Learn more
The maximum number of Official Comments have been posted. This comment will appear in the comment section below.   Learn more
Prompts for sign-in
  [Cancel]


Review Details

Item

Reviewer


Location: Greater San Francisco Bay Area, CA, USA

Top Reviewer Ranking: 2,618,490