Final answer:
The question is a play on words; there is no numerical square root of an acorn. The humorous or creative answer to the riddle would be that the 'square root' of an acorn is an oak tree, as an acorn grows into an oak.
Step-by-step explanation:
Given that the question is about finding the square root of an acorn, which may seem to be a nonsensical question at first, it's important to understand that this is a riddle or play on words rather than a standard mathematical problem. In essence, there is no numerical square root of an acorn, as an acorn is not a number but a seed. The question likely intends to evoke a humorous or creative response, pointing to the idea that an acorn, when planted, becomes an oak, and thus the 'square root' of an acorn could be amusingly considered to be an oak tree. This can serve as an illustrative example when understanding root concepts or exponential growth in mathematics or life science, but the real answer to the riddle lies outside the realm of strict mathematics.