I'm learning neural networks, and I'd like to give myself simple exercises and try to train neural networks to solve them.
I know that classifying hand-written digits is a classic problem, but I'm hoping for something much simpler than that. No image recognition, no thousand of input neurons.
One exercise I thought of, is to get a number and find its modulo when dividing by 7. But it was explained to me that this is actually a difficult task for a neural network beginner for various reasons.
Does anyone have ideas for a very simple exercise/training idea? Or a link to an existing list of exercises?