Do you find OK to include exercises in an answer?

(Silly) Example:

Q: How can $163^{163} \pmod {37}$ be computed?

A: Apply little Fermat's Theorem. You can use Fermat-Euler's Theorem in certain conditions. Could you compute $163^{163}\pmod{24}$?

I think that it should be OK. People pay for being taught, after all, or at least, education is considered as a social service. But I have tried this in some answers with no positive or negative feedback. Perhaps, just MSE isn't the web site for doing this.