Difference between revisions of "2007 iTest Problems/Problem 10"
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Revision as of 22:51, 4 October 2014
My grandparents are Arthur, Bertha, Christoph, and Dolores. My oldest grandparent is only years older than my youngest grandparent. Each grandfather is two years older than his wife. If Bertha is younger than Dolores, what is the difference between Bertha’s age and the mean of my grandparents’ ages?