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Who knows fifteen?

Please cite/link your sources, if possible. After about one business day, I will:

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  • Accept the best answer.

  • Go on to the next number.

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13 Answers

up vote 5 down vote accepted

Fifteen are the extra years added to King Chizkiyahu's lifetime, after his sincere prayer and resolution to fulfill Hashem's command to marry and bear children (II Kings 20:6 and Isaiah 38:5; Talmud, Berachos 10a).

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15 is the day of the month of Iyar that the Manna began to fall for the Jews in the desert.

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15 are the days S'faradim are not sad during the Omer.

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related judaism.stackexchange.com/a/27796/759 –  Double AA May 10 '13 at 2:58
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Fifteen are the unintelligent people it takes to make a minyan:

Hosheea es amecha uvarech es nachalesecha urem urem urem urem venasem urem venasem ad olam

(Yes, this is a joke.)

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Shalom, good one but the last word is Olam, not haolam ... as it is popularly sung incorrectly in the tune you are referring to! –  Yahu Apr 14 '10 at 19:46
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Yahu, People who think the word "urem" is repeated many times in the Pasuk are kal vachomer likely to make that mistake as well. –  Isaac Moses Jan 18 '11 at 20:08
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Chamisha Asar B'Omer always comes out on Rosh Chodesh

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...as does Shisha Asar. –  Alex Jan 18 '11 at 19:09
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Put it in as an answer at Shisha Asar. –  Gershon Gold Jan 18 '11 at 19:38
    
@Alex, not once we have kidush hachodesh, bb"a. –  msh210 Jul 10 '12 at 19:40
    
@msh ... al pi eidim ... –  Double AA Jan 30 at 0:58
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There are 15 Simanim at the Seder. Kadesh, Urchatz........

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Fifteen years old to start learning Talmud. (Avot 5:24)

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Fifteen is the date of holidays in five of the twelve months.

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Fifteen are the women who exempt their co-wives. (Mishna Yevamot 1:1)

(from Yibum and Chalitza)

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You could sing this one to the rhythm. –  Shalom Apr 14 '10 at 13:28
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With Fifteen (the gematria of the name Yud-Heh) He formed the worlds.

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Fifteen are the Shirei HaMa'alos.

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Fifteen are the steps from the azarah to the ezras Kohanim.

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Fifteen was the depth (in cubits) of the Flood waters above the mountaintops (Gen. 7:20) - or according to R' Yehudah (Bereishis Rabbah 32:17), all over the world.

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