Last week, reader Lola inquired if there was a way to construct a Math Square that didn't provide any number clues. There is, so we've offered one today for Brain Game #578. (Apologies for not publishing one yesterday; mentalfloss.com was experiencing difficulties due to a tricky update and kept deleting the post.) Enjoy!
The nine white squares inside the main red grid should be filled with the digits 1 through 9. Each digit should appear only once in this main grid (the red square). Place the 9 digits... READ ON