Updated: Jul 2, 2020
So by now you should hopefully know that whatever page you sell your product on should have a catchy title, you know, to keep people reading.
Studies found that including an ODD number not only caught readers attention but was viewed as more honest than an EVEN number.
Let's look at an example.
eBook: "Weight Loss For The Struggling."
Page title 1: The 9 Different Ways to Lose Weight That You Didn't Even Know Existed
Page title 2: The Secret I used to Lose 15 Pounds in a Month
Page title 3: The Only Lazy, Easy Way to Lose 3-7 Pounds Within 24 hours
Now, either your book is the answer, or the page that is selling the book discuses this, or lastly, you have a bonus item for them that details this available when one purchases the the book.
If these titles seem too risky or too garish for you, tone it down but still use the number.