Weekly Challenge
December 17-21, 2007

Help me figure out how many ornaments it
will take to decorate my tree. I put a star on the top of my tree
and string garland around the tree. The garland separates the
tree into sections for me to decorate. The top section uses 1
ornament and the next section uses 3 ornaments. The third section
down uses 5 ornaments as the tree gets wider and wider. If this
pattern continues, how many ornaments altogether will it take to
decorate my tree?
Hint: I count 6 sections on my tree.
For 4th and 5th graders: If each box of ornaments contains 12
ornaments and costs $6.00 a box, how much will it cost me to buy
ornaments?