Here is an example of how bad #LLMs are with math. I asked about velocity in the context of Agile process. The answer?
“Sure! Let's say that an Agile development team has completed four iterations, each lasting two weeks. In the first iteration, they delivered 12 user stories; in the second, they delivered 10; in the third, they delivered 9; and in the fourth, they delivered 8. The total number of user stories completed by the end of the fourth iteration is 49 (12 + 10 + 9 + 8)”.