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Rule Out Extra Information

Rule out information that is not needed to solve the problem.

Some math problems have too much information. Smart test-takers decide which facts they need and which they don't. Let's try it with the problem below. Read it on your own. Then click the arrow, and we'll solve it together.

There will be 115 people at an awards banquet. Twenty people will get awards, and 5 will give speeches. If each table seats 8 people, what is the least number of tables needed?

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Houghton Mifflin