book Maths Puzzle Numerical Ability

If you have a triangle and the points are set up in a matrix what do you times that matrix by to get the tringle to move 180 degrees on the point of origin

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book Other Question

I am inventing a new cookie recipe. I'd like the recipe to contain both walnuts and gourmet chocolate chip chunks. Walnuts sell for $3.00 per pound and gourmet chips sell for $1. Rewrite the following without an exponent:

(-2)^-2