Big Square Mini Mathematical Universe
This Mini Mathematical Universe is good to explore with students who are learning multiplication.
Here is the pdf: https://mathpickle.com/wp-content/upl...
Andrew Howroyd has extended the number of impossible entries to 18.
Here they are: 3, 7, 14, 21, 23, 43, 47, 62, 75, 119, 134, 138, 167, 215, 318, 398, 566, 1487
Thank you, Andrew!!!