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Curated OER
Extending Online Number Sequences
In this online number sequences learning exercise, students work out the answers to eight comprehensive exercises with thirty-eight calculations involving a variety of sequences. Students answers are automatically graded online as they...
Mathigon
Mathigon: Algebra: Figurate Numbers
There are many other sequences that are based on certain geometric shapes. These sequences are often called Figurate numbers, numbers that can be represented using geometric shapes. Examples include square, triangle, and tetrahedral...