Wednesday, May 30, 2012

Problem of the week (Due, Wednesday, May 6)


Getting home
Bus #7 left the elementary school partially filled and arrived at the middle school where fifteen students boarded the bus. The bus continued as follows:
*At the first four stops, two students got off the bus at each.
*At the next stop, three students got off the bus.
*At the next six stops, one student got off at each.
*Ten students got off at the recreation center, where five kindergarten students boarded the bus.
*At the final stop, seven students got off the bus leaving only the driver.
How many students boarded the bus at the elementary school?

Include: Solution, Strategy, Proof

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