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Comment : Elementary matrix quiz
Comment : This quiz is designed to test basic concepts concerning matrices and vectors.

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Question 1: Let A be an 3 x 4 matrix, and let B be a 4 x 3 matrix. Which of the four operations A x B, B x A, A + B, A - B make sense?

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	A x B and B x A make sense.
	A+B and A-B make sense.
	None of the operations make sense.
	A x B makes sense.
	All of the operations make sense.
	A+B makes sense.
	B x A makes sense.