Are more model parameters always better?

I'm a retired Electrical engineer and wanted to see what these models could do. I installed Quen3-8B on my raspberry pi 5. This took 15 minutes with Ollama. I made sure it was disconnected from the web and asked it trivia questions. "Did George Washington secretly wear Batman underwear", "Say the pledge of allegiance like Elmer Fudd", write python for an obscure API, etc. It was familiar with all the topics but at times, would embellish and hallucinate. The speed on the Pi is decent, about 1T/sec. Next math "write python to solve these equations using backward Euler.