🎓 Quiz
הלכות קידוש החודש פרק ט · 5 Questions
Question 1
What is the time interval between consecutive tekufot using the 365¼-day method?
Between each two tekufot: 91 days and 7½ hours — one quarter of a 365¼-day solar year (Halacha 2).
Question 2
How many days and hours did the Nisan tekufah of Creation precede the Nisan molad?
The mnemonic is 7-9-642: seven days, nine hours, and 642 chalakim (Halacha 3).
Question 3
In the tekufah calculation, how much is added for each complete year within the current cycle?
For each complete year in the cycle, add 10 days, 21 hours, and 204 chalakim — the difference between the solar and lunar year (Halacha 4).
Question 4
In year 4930, on what day of Nisan did the Nisan tekufah fall?
The calculation yielded Monday as the starting point; adding days to reach Thursday gave the 8th of Nisan (Halacha 7).
Question 5
If the calculation requires adding more than four days to reach the tekufah day, what does this indicate?
The Rambam rules that needing more than four days means there is certainly an error, and one must go back and recalculate carefully (Halacha 8).