1. On which day of the week is there a special Mitzvah to formulate "Chiddushei Torah"?
2. Is it permissible to keep one's Tzitzis exposed within four Amos of the grave of a woman (who was not obligated in this Mitzvah)?
3. According to Torah law, how many days of mourning must be observed?
4. Who was the first person to survive a sneeze?
Answers:
1. There is a special Mitzvah to formulate Chiddushei Torah on Shabbos (see Mishnah Berurah 290:23).
2. There is a difference of opinion whether or not it is permissible to wear exposed Tzitzis within 4 Amos of the grave of a woman (Pischei Teshuvah Yoreh Deah 367, Mishnah Berurah 23:5, Gesher Hachaim V:2:3).
3. According to some opinions, the Torah obligation of mourning is for seven days (Yerushalmi Moed Koton 3:5). Others maintain that according to the Torah, only the day of death and the day of burial are obligatory. Shiva was enacted by Moshe (see Rif Berachos end of Ch. 2, Rambam Hil Aveilus 1:1).
4. Until the time of Yaakov, people would sneeze and then die suddenly. Yaakov was the first person who became ill before he died and did not die from a sneeze (Pirkei D' Rebbi Eliezer 52).
