Making Incense

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Q: . Four of the 11 spices used in making incense for the temple were stacte, onycha, galbanum and frankincense. (Shemos 30:34) We are told that equal amounts of each are to be used in making the incense. If the combined weight of these 4 spices is 160 maneh, how much stacte would we use?

A: 160/4 = 40 maneh.