Adjacent-numbered pages: BP314 BP315 BP316 BP317 BP318  *  BP320 BP321 BP322 BP323 BP324
math, unorderedpair, traditional
two_dot_clusters [smaller | same | bigger]
Aaron David Fairbanks
The point is that, on the left, the two groups look about the same to the eye at first glance.
In left examples the numbers are off by a factor of 7/6 or less vs. in right examples the numbers are off by a factor of 2 or greater.
Adjacent-numbered pages: BP315 BP316 BP317 BP318 BP319  *  BP321 BP322 BP323 BP324 BP325
nice, traditional
Adjacent-numbered pages: BP920 BP921 BP922 BP923 BP924  *  BP926 BP927 BP928 BP929 BP930