martes, 25 de febrero de 2014

3rd year. Third challenge

Sonia has 55 blocks.  She decides to stack up all the blocks so that each row has one less
block than the row below.  She wants to end up with just 1 block on top.  How many should
she put in the bottom row? 

miércoles, 12 de febrero de 2014

martes, 21 de enero de 2014

3rd Year. First challenge

·         A. A rectangular garden measuring 12 meters by 16 meters is to have a pedestrian pathway installed all around it, increasing the total area to 285 square meters. What will be the width of the pathway?

·         B. During practice, a softball pitcher throws a ball whose height can be modeled by the equation h = -16t 2  + 24t +1, where h = height in feet and t = time in seconds.  How long does it take for the ball to reach a height of 6 feet?