Question 310816
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The problem is saying that at the beginning you were trying to arrange the marbles you had into rows containing 13 each.  You couldn't complete the task until you borrowed 5 marbles from your friend.  That means before you borrowed any marbles, you had some number of rows of 13 marbles (and you don't care how many) plus one row that only had 13 minus 5 equals 8 marbles in it.  So, if you had taken the number of marbles that you had to start with and divided that number by 13, you would have gotten a quotient equal to the number of full rows of 13 marbles that you started with plus 8 for a remainder.


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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