Isopsephia, also Isopsephy, was an ancient Greek practice of coding numerical riddles into written riddles that could be solved with mathematical computation. Examples are as follows from history. Notice the part about Nero and Isopsephia, which is very much gematria.
With our English language, notice how we've been solving numerical riddles in language all this time, the ones we see in the daily news, headlines, sports games, and more. The bridge between the two is gematria, the practice of coding numbers into words.
Remember, Pythagoras brought gematria to Greece, after studying in Egypt.
54 AD, eh? Love = 54 / 54; Eyes = 54 / 54; Lungs = 54 / 54
It is funny I started with Gematria, the Vesica Piscis, the Greeks, but somehow overlooked this part about riddles. Well, better late than never...
Geometry = 45
Consider Donald Trump, the 45th President... Donald J. Trump = 148 (888)
Plato = 26; Greek = 26; God = 26; Letter = 26; Torah = 26; Adam = 26; Add Up = 26; Count = 26
Republic = 49; Washington = 49; Pythagoras = 49