Who knows one hundred one?

Please cite/link your sources, if possible. At some point at least twenty-four hours from now, I will:

  • Upvote all interesting answers.

  • Accept the best answer.

  • *Go on to the next number.

  • 2
    This is question #1000! – Isaac Moses Oct 10 '10 at 1:31
  • Elef mi yodeya? – Dave Oct 10 '10 at 5:08
  • 1
    @Dave, we did that one already: see mi.yodeya.com/questions/645 (and en.wiktionary.org/wiki/%D7%A2%D7%9C%D7%A3 ) – msh210 Oct 10 '10 at 5:41
  • 1
    @msh210 - Groan... :P – Dave Oct 10 '10 at 13:33
  • Anyone have a source for safardim doing 101 on the shofar (a safardi would be a good source)? How about everyone quoting the 101 yevavos of Sisera's mom (despite that Tos. quotes the Aruch as 100 and who knows how to count any of them!)? – YDK Oct 11 '10 at 18:02

Learning 101 times is a lot better than learning 100 times


101 is the total amount in which a unit Terumah (4:11) and Challah (1:9)are batel.


101 are the bones on each side of the human body. (Ohalos 1:8)


101 were the years of Montefiore.

  • 1
    According to the linked-to article, he died in his 101st year, before his 101st birthday. You're correct according to רֻבּוֹ כְכֻּלּוֹ, though (and a fortiori according to יום אחד בשנה חשוב שנה). Plus, it fits the beat. :-) – msh210 Oct 11 '10 at 16:25
  • @msh210 - I notice that you translated Kal Vachomer but not "round to nearest" or "round up." – Isaac Moses Oct 11 '10 at 16:55
  • I'm used to using the phrase "a fortiori" even in secular contexts, whereas the Hebrew phrases I used refer to halachic concepts only (AFAIK). That said, I'm no ראשון: I'll often pick my words carelessly. – msh210 Oct 11 '10 at 18:13
  • I've often wondered about this - Outside the philosophy, math (maybe), and classics departments at universities, are secular people you speak to typically familiar with "a fortiori"? (Same question for "ab initio.") – Isaac Moses Oct 11 '10 at 18:23
  • On second thought, don't answer that yet. It's going to be an actual Question. – Isaac Moses Oct 11 '10 at 18:30

this is a phone number of מגן דוד אדום in Israel


One hundred and one are the verses in Parashas Tetzaveh, which corresponds to learning something one hundred and one times. Learning this many times will ensure that you don't forget. Thus, this parasha is often the parasha connected to Parashas Zachor, which exhorts us לא תשכח, do not forget. Amalek, who wants us to forget, is עמל-ק, work up to only 100.

(Heard from R' Nochum Lansky of Ner Israel)

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