Difficulty: easy-ish. Another SAT-type reasoning question. Fun to watch the students work out the ramifications.
Problem 26
Difficulty: Medium. Is it wrong of me to get really annoyed at this question? It's not terribly difficult, but it is so ... artificial.
Standard instructions for this series: No calculator allowed. Express answers in reduced form. Rationalize denominators. Radicals must be reduced. All numbers are base ten unless otherwise specified. Do not approximate radicals or π. Leave such answers as 1025π or √39, for example. Source: UVM Math Contest
answer 16 and answer 26.
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