KDP categories · Top KDP authors
Number Systems (Mathematics, Books): Amazon KDP category data
Amazon Books Best Sellers data for Number Systems (Mathematics, Books), updated Nov 3, 2026: median price $9.99, median 11 reviews, average rating 4.5 and a KDPTop opportunity score of 27/100 (highly competitive).
| Price range (middle 50%) | $9.99 – $14.69 |
|---|---|
| Average rating | 4.5 |
| New releases (90 days) | 6% |
| Books on the list | 100 |
| Store | Books |
What stands out
- Its median reviews are 1% of the parent category Mathematics (1,295), one of the easier corners under it.
- At $9.99 its median price is below 91% of Books categories, so it is a volume game.
- Its review barrier is lower than in 82% of Books categories: the median best seller has only 11 reviews, so new books can chart with few.
Top 10 Number Systems best sellers
-
Sudoku Book for Adults - Large Print: Sudoku Puzzle Book with Solutions - The Perfect Challenge for All Skill Levels
by Kimokotoo Publishing
- List rank#1
- Price$5.99
- Rating4.7
- Reviews1,068
-
-
100 Timed Tests for Addition and Subtraction: Math Book for Kids Ages 4 to 7 | Preschool, Kindergarten & 1st Grade Educational Math Workbook | Addition and Subtraction Mathematics Drills
by Lucas & Friends by RV AppStudios
- List rank#3
- Price$3.99
- Rating4.8
- Reviews816
-
Number Tracing book for Preschoolers: Preschool Numbers Tracing Math Practice Workbook: Math Activity Book for Pre K, Kindergarten and Kids Ages 3-5
- List rank#4
- Price$9.99
- Rating4.8
- Reviews3,424
-
300 Math CrossWord Puzzles: Addition, Subtraction, Multiplication, and Division Puzzles | Criss Cross Challenges for Kids & Adults
by Josh Ortiz Martin
- List rank#5
- Price$7.99
- Rating4.6
- Reviews343
-
Quadrivium: The Four Classical Liberal Arts of Number, Geometry, Music, & Cosmology (Wooden Books, 33)
by Miranda Lundy
- List rank#6
- Price$10.15
- Rating4.8
- Reviews2,127
-
Competition Math: for Middle School
by J. Batterson
- List rank#7
- Price$29.50
- Rating4.5
- Reviews445
-
The Joy Of X: A Guided Tour of Math, from One to Infinity ― A Popular Science Book on Google Searches
- List rank#8
- Price$11.07
- Rating4.5
- Reviews2,677
-
Math Olympiad Academy: AMC 8 Prep Guide | Concept Lessons, 400+ Practice Questions & 15 Full-Length Tests for Motivated Students Aiming for a 20+ Score | MOEMS & MATHCOUNTS Ready
by Katherine Whitmore
- List rank#9
- Price$30.99
- Rating5.0
- Reviews44
-
Math Practice Workbook Grades 6-8: 1000+ Questions You Need to Kill in Middle School by Brain Hunter Prep (Arithmetic, Algebra, Geometry, Measurement, ... more in Kill It Series by Brain Hunter Prep)
by Brain Hunter Prep
- List rank#10
- Price$24.99
- Rating4.2
- Reviews1,492
Same niche in Kindle eBooks: Number Systems
FAQ
Is Number Systems a good niche for Amazon KDP?
Its KDPTop opportunity score is 27/100, which makes it highly competitive. The median best seller has 11 reviews and sells for $9.99.
How many reviews do you need to rank in Number Systems?
The median best seller has 11 reviews, and 86% of them have fewer than 100.
What do Number Systems best sellers cost?
The median price is $9.99; half of the best sellers are priced between $9.99 and $14.69.
Can new books break into Number Systems?
6% of the current best sellers were released in the last 90 days.
About this data
Data comes from KDPTop's daily crawl of Amazon's public Best Sellers pages; medians use the latest list. The opportunity score (0–100, higher is easier to enter) combines the review barrier, the share of low-review books, list turnover, new-release share and price.