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Hi Peter, I suggest using a times table to determine the number of products between 100 and 200. Don't be intimidated since you will not have to multiply all combinations of two digit numbers. To determine how many combinations of randomly selected pairs of two digit numbers there are consider how many two digit numbers there are and how many of these two digit numbers you are choosing at one time. For further help check out this review on combinations http://mathcentral.uregina.ca/QQ/database/QQ.09.07/h/hakan1.html Janice | ||||||||||||
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