This is our first week back in school during which our students have been learning aspects of their new handheld (TI-Nspire CAS) and online (Wolfram Alpha) CAS in the context of enhancing their problem-solving ideas. While exploring the capabilities of these amazing computational tools, one student entered a number like 300! (That’s factorial) and was pretty impressed to see all of the digits listed. Before going further, I asked
- how they might determine the number of digits in 300!,
- what the final digit was, and
- how many of that final digit were in an uninterrupted sequence at the end of an expanded representation of 300!.
We’ll give a few days for your ideas before posting our students’ thoughts.