Why do Jews often so closely resemble the members of the nationalities amongst whom they have been living for only a few hundred years? How do features spread through such an exclusive population so ...
B'reshis chapter 46 lists the seventy descendants of Yaakov who went to Egypt. It actually lists sixty-nine: let's assume Yocheved was the seventieth, as Rashi explains. It also lists (in pasuk 12) ...
In the begining of Parshat B'shalach, Rashi says that one p'shat for "Vachamushim" means one fifth, because during Makas Choshech, 4 out of 5 were killed out, and it happened during the time it was ...
In the begining of sefer bamidbar, the males between 20 and 60 are counted and it says that there are over 600,000 of them. Theoretically each, or most, of these people should have had a first-born ...
I once heard that if Israel has the largest Jewish population, it has a significant effect on certain Halachot. What are the criteria for this, and what halachot are affected? (Shmita is the one most ...
Does anyone have reliable statistics (and barring that, reasonable anectdotal evidence) of the fraction of Kohanim, Levi'im, and Yisraelim in various Jewish communities today. By "communities" I don't ...
The census in Bamidbar 26 is directed thus: Take the sum of all the congregation of the children of Israel, from twenty years old and upward, by their fathers' houses, all that are able to go ...
What are the statistics for the last 50-100 years as to how many people convert and become Geirim yearly?
About how many pidyon haben ceremonies are required to be performed per 1000 Jewish births in the past few decades? The requirements for a pidyon haben are: Both parents are Israel, not Kohen or ...