31

  

• The number of years approximately equal to 1 billion seconds

https://freeglobaluniversity.blogspot.com/search/label/Bill

• The number of kings defeated by the incoming Israelite settlers in Canaan according to Joshua 12:24: "all the kings, one and thirty" (Wycliffe Bible translation)

https://freeglobaluniversity.blogspot.com/search/label/Bible

• Number of letters in Macedonian alphabet
• Number of letters in Ottoman alphabet

https://freeglobaluniversity.blogspot.com/search/label/Alphabet

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