Open excel
Type 6 in a cell (Noah's 3 sons and their wives)
Make the cell below it equal to 1.5 times the first cell (i.e. each couple had three surviving children)
Take this second cell and autofill down
You get to 7 billion really fast
Type 6 in a cell (Noah's 3 sons and their wives)
Make the cell below it equal to 1.5 times the first cell (i.e. each couple had three surviving children)
Take this second cell and autofill down
You get to 7 billion really fast