exploreAdjust the slider below to pack farm figs (anjeer) in distinct rect grids to prove if a number is prime or composite!
grain Anjeer Rectangles
Class 6 Section 5.2: Guna and Anshu pack figs from their farm. Adjust the count to see how many rectangular layouts are possible!
Number of Figs:12 Figs
Interactive Factor Analysis
school Prime vs. Composite:
If you can make more than one rectangular arrangement (more than 2 factors), the number is Composite. If you can make only one unique layout (like 1 × 7 or 7 × 1), the number has only two factors and is Prime!
Active Rectangular Arrays
12 is a Composite Number!
Because 12 can be divided by 1, 2, 3, 4, 6, and 12, it has more than 2 distinct factors.
filter_alt Sift & Divisibility
Class 6 Section 5.5: Run divisibility filters to highlight numbers or step-through the Sieve of Eratosthenes!
Divisibility Rules Filters
Sieve of Eratosthenes
lightbulb Perfect Numbers:
Try hover or tap any number on the right. Perfect numbers are those whose sum of proper divisors equals the number itself (e.g. 6 = 1+2+3).