When the nut is not a sin .. There are custom - in the days of Rosh Hashanah is not nuts. After Nut - Egoz Hebrew (Aleph-gimmel-Vav-Zayin) has gematria - 17, the same as the word Sin (Het - hav-wall). But Baal Sulyam explains that the one who made Tashuv Hei (return to the Creator - that is compared to him in quality, by correcting the desire to receive) - can eat nuts. For him gematria 17 does not refer to a hat, and a Comrade (Tet Vav-bet), which means Good, Good.