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2013 AMC 8 Question 16

AMC8 · 2013 AMC 8

Question 16

A number of students from Fibonacci Middle School are taking part in a community service project. The ratio of $8$th-graders to $6$th-graders is $5:3,$ and the ratio of $8$th-graders to $7$th-graders is $8:5.$ What is the smallest number of students that could be participating in the project?
  1. $16$
  2. $40$
  3. $55$
  4. $79$
  5. $89$