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Tuesday, January 29, 2008

Wibs and Wobs

Let's say 26 zips weigh as much as 4 crids and 2 wobs. Also, 8 zips and 2 crids have the same weight as 2 wobs.

How many zips have the weight of 1 wob?

2 comments:

  1. 7 zips weigh as much as a single wob

    ReplyDelete
  2. That was my answer, too, Abe.

    1) 26Z=4C+2W
    2) 8Z + 2C = 2W

    Take 2 and rearrange to get
    4C=4W-16Z

    Take that and put it into 1)
    26Z = 4W - 16Z + 2W
    42Z = 6W
    7Z = W

    ReplyDelete

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