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Problem 11 (2009 AMC 8)

AMC 8Easy

From module Arithmetic and Number Theory Basics

Problem

The Amaco Middle School bookstore sells pencils costing a whole number of cents. Some seventh graders each bought a pencil, paying a total of \1.43.Someofthe. Some of the 30sixthgraderseachboughtapencil,andtheypaidatotalofsixth graders each bought a pencil, and they paid a total of$1.95$. How many more sixth graders than seventh graders bought a pencil?

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