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  1. I

    prove that it is possible to use angle irons to tile a 5 x 5 checkerboard

    with the upper left corner removed? i need to prove this statement using the second principle of mathematical induction in which we assume p(1) is true for all K [p(r) true for all r, 1=<r=<k ----> P (k+1) true]
  2. I

    Friends birthday tomorrow, what should i draw?

    It's my friends birthday tomorrow and i dont have any money to buy anything so i thought i could draw a picture, or design a birthday card. Just wondering if anyones got any ideas? x thanks s
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